Error message

Warning: Undefined variable $is_live in _uofm_unit_is_live() (line 97 of sites/cse.umn.edu/modules/custom/uofm_check_access/uofm_check_access.module).

_uofm_unit_is_live(Array) (Line: 65)
uofm_check_access_node_access(Object, 'view', Object)
call_user_func_array(Object, Array) (Line: 409)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'uofm_check_access') (Line: 388)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('node_access', Object) (Line: 416)
Drupal\Core\Extension\ModuleHandler->invokeAll('node_access', Array) (Line: 97)
Drupal\Core\Entity\EntityAccessControlHandler->access(Object, 'view', Object, 1) (Line: 101)
Drupal\node\NodeAccessControlHandler->access(Object, 'view', Object, 1) (Line: 706)
Drupal\Core\Entity\ContentEntityBase->access('view', Object, 1) (Line: 195)
Drupal\node\Entity\Node->access('view', Object, 1) (Line: 68)
Drupal\Core\Entity\EntityAccessCheck->access(Object, Object, Object)
call_user_func_array(Array, Array) (Line: 160)
Drupal\Core\Access\AccessManager->performCheck('access_check.entity', Object) (Line: 136)
Drupal\Core\Access\AccessManager->check(Object, Object, NULL, 1) (Line: 93)
Drupal\Core\Access\AccessManager->checkNamedRoute('entity.node.canonical', Array, Object, 1) (Line: 227)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->menuLinkCheckAccess(Object) (Line: 107)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array)
call_user_func(Array, Array) (Line: 149)
Drupal\Core\Menu\MenuLinkTree->transform(Array, Array) (Line: 1542)
Drupal\superfish\Plugin\Block\SuperfishBlock->build() (Line: 171)
Drupal\block\BlockViewBuilder::preRender(Array)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 797)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 386)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 458)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111)
__TwigTemplate_08c003f912d2e2a08b6c475e711aa076->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 50)
__TwigTemplate_08bbef2c74ad7005f6a63ed83e881ad5->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/page.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('page', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 95)
__TwigTemplate_beb7b1c6135a238515373c2e4a7641dc->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/html.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 158)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 159)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Warning: Attempt to read property "value" on null in _uofm_unit_is_live() (line 97 of sites/cse.umn.edu/modules/custom/uofm_check_access/uofm_check_access.module).

_uofm_unit_is_live(Array) (Line: 65)
uofm_check_access_node_access(Object, 'view', Object)
call_user_func_array(Object, Array) (Line: 409)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'uofm_check_access') (Line: 388)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('node_access', Object) (Line: 416)
Drupal\Core\Extension\ModuleHandler->invokeAll('node_access', Array) (Line: 97)
Drupal\Core\Entity\EntityAccessControlHandler->access(Object, 'view', Object, 1) (Line: 101)
Drupal\node\NodeAccessControlHandler->access(Object, 'view', Object, 1) (Line: 706)
Drupal\Core\Entity\ContentEntityBase->access('view', Object, 1) (Line: 195)
Drupal\node\Entity\Node->access('view', Object, 1) (Line: 68)
Drupal\Core\Entity\EntityAccessCheck->access(Object, Object, Object)
call_user_func_array(Array, Array) (Line: 160)
Drupal\Core\Access\AccessManager->performCheck('access_check.entity', Object) (Line: 136)
Drupal\Core\Access\AccessManager->check(Object, Object, NULL, 1) (Line: 93)
Drupal\Core\Access\AccessManager->checkNamedRoute('entity.node.canonical', Array, Object, 1) (Line: 227)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->menuLinkCheckAccess(Object) (Line: 107)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array)
call_user_func(Array, Array) (Line: 149)
Drupal\Core\Menu\MenuLinkTree->transform(Array, Array) (Line: 1542)
Drupal\superfish\Plugin\Block\SuperfishBlock->build() (Line: 171)
Drupal\block\BlockViewBuilder::preRender(Array)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 797)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 386)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 458)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111)
__TwigTemplate_08c003f912d2e2a08b6c475e711aa076->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 50)
__TwigTemplate_08bbef2c74ad7005f6a63ed83e881ad5->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/page.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('page', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 95)
__TwigTemplate_beb7b1c6135a238515373c2e4a7641dc->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/html.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 158)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 159)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Warning: Undefined variable $is_live in _uofm_unit_is_live() (line 97 of sites/cse.umn.edu/modules/custom/uofm_check_access/uofm_check_access.module).

_uofm_unit_is_live(Array) (Line: 65)
uofm_check_access_node_access(Object, 'view', Object)
call_user_func_array(Object, Array) (Line: 409)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'uofm_check_access') (Line: 388)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('node_access', Object) (Line: 416)
Drupal\Core\Extension\ModuleHandler->invokeAll('node_access', Array) (Line: 97)
Drupal\Core\Entity\EntityAccessControlHandler->access(Object, 'view', Object, 1) (Line: 101)
Drupal\node\NodeAccessControlHandler->access(Object, 'view', Object, 1) (Line: 706)
Drupal\Core\Entity\ContentEntityBase->access('view', Object, 1) (Line: 195)
Drupal\node\Entity\Node->access('view', Object, 1) (Line: 68)
Drupal\Core\Entity\EntityAccessCheck->access(Object, Object, Object)
call_user_func_array(Array, Array) (Line: 160)
Drupal\Core\Access\AccessManager->performCheck('access_check.entity', Object) (Line: 136)
Drupal\Core\Access\AccessManager->check(Object, Object, NULL, 1) (Line: 93)
Drupal\Core\Access\AccessManager->checkNamedRoute('entity.node.canonical', Array, Object, 1) (Line: 227)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->menuLinkCheckAccess(Object) (Line: 107)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array) (Line: 111)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array)
call_user_func(Array, Array) (Line: 149)
Drupal\Core\Menu\MenuLinkTree->transform(Array, Array) (Line: 1542)
Drupal\superfish\Plugin\Block\SuperfishBlock->build() (Line: 171)
Drupal\block\BlockViewBuilder::preRender(Array)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 797)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 386)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 458)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111)
__TwigTemplate_08c003f912d2e2a08b6c475e711aa076->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 50)
__TwigTemplate_08bbef2c74ad7005f6a63ed83e881ad5->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/page.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('page', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 95)
__TwigTemplate_beb7b1c6135a238515373c2e4a7641dc->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/html.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 158)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 159)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Warning: Attempt to read property "value" on null in _uofm_unit_is_live() (line 97 of sites/cse.umn.edu/modules/custom/uofm_check_access/uofm_check_access.module).

_uofm_unit_is_live(Array) (Line: 65)
uofm_check_access_node_access(Object, 'view', Object)
call_user_func_array(Object, Array) (Line: 409)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'uofm_check_access') (Line: 388)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('node_access', Object) (Line: 416)
Drupal\Core\Extension\ModuleHandler->invokeAll('node_access', Array) (Line: 97)
Drupal\Core\Entity\EntityAccessControlHandler->access(Object, 'view', Object, 1) (Line: 101)
Drupal\node\NodeAccessControlHandler->access(Object, 'view', Object, 1) (Line: 706)
Drupal\Core\Entity\ContentEntityBase->access('view', Object, 1) (Line: 195)
Drupal\node\Entity\Node->access('view', Object, 1) (Line: 68)
Drupal\Core\Entity\EntityAccessCheck->access(Object, Object, Object)
call_user_func_array(Array, Array) (Line: 160)
Drupal\Core\Access\AccessManager->performCheck('access_check.entity', Object) (Line: 136)
Drupal\Core\Access\AccessManager->check(Object, Object, NULL, 1) (Line: 93)
Drupal\Core\Access\AccessManager->checkNamedRoute('entity.node.canonical', Array, Object, 1) (Line: 227)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->menuLinkCheckAccess(Object) (Line: 107)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array) (Line: 111)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array)
call_user_func(Array, Array) (Line: 149)
Drupal\Core\Menu\MenuLinkTree->transform(Array, Array) (Line: 1542)
Drupal\superfish\Plugin\Block\SuperfishBlock->build() (Line: 171)
Drupal\block\BlockViewBuilder::preRender(Array)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 797)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 386)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 458)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111)
__TwigTemplate_08c003f912d2e2a08b6c475e711aa076->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 50)
__TwigTemplate_08bbef2c74ad7005f6a63ed83e881ad5->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/page.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('page', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 95)
__TwigTemplate_beb7b1c6135a238515373c2e4a7641dc->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/html.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 158)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 159)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Warning: Undefined variable $is_live in _uofm_unit_is_live() (line 97 of sites/cse.umn.edu/modules/custom/uofm_check_access/uofm_check_access.module).

_uofm_unit_is_live(Array) (Line: 65)
uofm_check_access_node_access(Object, 'view', Object)
call_user_func_array(Object, Array) (Line: 409)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'uofm_check_access') (Line: 388)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('node_access', Object) (Line: 416)
Drupal\Core\Extension\ModuleHandler->invokeAll('node_access', Array) (Line: 97)
Drupal\Core\Entity\EntityAccessControlHandler->access(Object, 'view', Object, 1) (Line: 101)
Drupal\node\NodeAccessControlHandler->access(Object, 'view', Object, 1) (Line: 706)
Drupal\Core\Entity\ContentEntityBase->access('view', Object, 1) (Line: 195)
Drupal\node\Entity\Node->access('view', Object, 1) (Line: 68)
Drupal\Core\Entity\EntityAccessCheck->access(Object, Object, Object)
call_user_func_array(Array, Array) (Line: 160)
Drupal\Core\Access\AccessManager->performCheck('access_check.entity', Object) (Line: 136)
Drupal\Core\Access\AccessManager->check(Object, Object, NULL, 1) (Line: 93)
Drupal\Core\Access\AccessManager->checkNamedRoute('entity.node.canonical', Array, Object, 1) (Line: 227)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->menuLinkCheckAccess(Object) (Line: 107)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array) (Line: 111)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array)
call_user_func(Array, Array) (Line: 149)
Drupal\Core\Menu\MenuLinkTree->transform(Array, Array) (Line: 1542)
Drupal\superfish\Plugin\Block\SuperfishBlock->build() (Line: 171)
Drupal\block\BlockViewBuilder::preRender(Array)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 797)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 386)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 458)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111)
__TwigTemplate_08c003f912d2e2a08b6c475e711aa076->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 50)
__TwigTemplate_08bbef2c74ad7005f6a63ed83e881ad5->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/page.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('page', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 95)
__TwigTemplate_beb7b1c6135a238515373c2e4a7641dc->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/html.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 158)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 159)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
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Drupal\Core\Extension\ModuleHandler->invokeAllWith('node_access', Object) (Line: 416)
Drupal\Core\Extension\ModuleHandler->invokeAll('node_access', Array) (Line: 97)
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Drupal\node\NodeAccessControlHandler->access(Object, 'view', Object, 1) (Line: 706)
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Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
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Twig\Template->render(Array) (Line: 38)
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__TwigTemplate_beb7b1c6135a238515373c2e4a7641dc->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
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Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 191)
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Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
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Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
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Drupal\Core\Extension\ModuleHandler->invokeAllWith('node_access', Object) (Line: 416)
Drupal\Core\Extension\ModuleHandler->invokeAll('node_access', Array) (Line: 97)
Drupal\Core\Entity\EntityAccessControlHandler->access(Object, 'view', Object, 1) (Line: 101)
Drupal\node\NodeAccessControlHandler->access(Object, 'view', Object, 1) (Line: 706)
Drupal\Core\Entity\ContentEntityBase->access('view', Object, 1) (Line: 195)
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call_user_func_array(Array, Array) (Line: 160)
Drupal\Core\Access\AccessManager->performCheck('access_check.entity', Object) (Line: 136)
Drupal\Core\Access\AccessManager->check(Object, Object, NULL, 1) (Line: 93)
Drupal\Core\Access\AccessManager->checkNamedRoute('entity.node.canonical', Array, Object, 1) (Line: 227)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->menuLinkCheckAccess(Object) (Line: 107)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array) (Line: 111)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array)
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Drupal\Core\Menu\MenuLinkTree->transform(Array, Array) (Line: 1542)
Drupal\superfish\Plugin\Block\SuperfishBlock->build() (Line: 171)
Drupal\block\BlockViewBuilder::preRender(Array)
call_user_func_array(Array, Array) (Line: 111)
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Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 386)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 458)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
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Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
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Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 95)
__TwigTemplate_beb7b1c6135a238515373c2e4a7641dc->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
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Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 445)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
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Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
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call_user_func_array(Object, Array) (Line: 409)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'uofm_check_access') (Line: 388)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('node_access', Object) (Line: 416)
Drupal\Core\Extension\ModuleHandler->invokeAll('node_access', Array) (Line: 97)
Drupal\Core\Entity\EntityAccessControlHandler->access(Object, 'view', Object, 1) (Line: 101)
Drupal\node\NodeAccessControlHandler->access(Object, 'view', Object, 1) (Line: 706)
Drupal\Core\Entity\ContentEntityBase->access('view', Object, 1) (Line: 195)
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Drupal\Core\Entity\EntityAccessCheck->access(Object, Object, Object)
call_user_func_array(Array, Array) (Line: 160)
Drupal\Core\Access\AccessManager->performCheck('access_check.entity', Object) (Line: 136)
Drupal\Core\Access\AccessManager->check(Object, Object, NULL, 1) (Line: 93)
Drupal\Core\Access\AccessManager->checkNamedRoute('entity.node.canonical', Array, Object, 1) (Line: 227)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->menuLinkCheckAccess(Object) (Line: 107)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array) (Line: 111)
Drupal\Core\Menu\DefaultMenuLinkTreeManipulators->checkAccess(Array)
call_user_func(Array, Array) (Line: 149)
Drupal\Core\Menu\MenuLinkTree->transform(Array, Array) (Line: 1542)
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call_user_func_array(Array, Array) (Line: 111)
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Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 386)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 458)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111)
__TwigTemplate_08c003f912d2e2a08b6c475e711aa076->doDisplay(Array, Array) (Line: 394)
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__TwigTemplate_08bbef2c74ad7005f6a63ed83e881ad5->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
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Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
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__TwigTemplate_beb7b1c6135a238515373c2e4a7641dc->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 53)
twig_render_template('sites/cse.umn.edu/themes/custom/cse/templates/html.html.twig', Array) (Line: 372)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 445)
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Drupal\Core\Render\Renderer->render(Array) (Line: 158)
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Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

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Home
About
Research

Research

We develop chemical theories and computations to solve the world's most pressing environmental and societal problems.

Research Overview

Topics range from hardcore electronic structure theories to classical simulation methods. Specifically, we study how bonds form and break in chemical systems, and use these rules to study phenomena related to catalysis. These ideas are applied to reactions that are well-established in industry. New catalysis methods are discovered to make these reactions more effective and efficient. We guide experimentalists in their research using predictions and theories, providing insight into what will and won’t work in the lab. This deeper level of knowledge results in safer and less costly experiments.
Applications range from modeling materials related to sustainable energies to biological systems. Some examples include the conversion of natural gas, gas separation, and extraction of heavy elements from the nuclear fuel cycle.

Featured Publications by Research Area

Expand all

Biomass and plastics pyrolysis

Featured publications:

Computational screening of metal–organic frameworks for biogas purification
C–H Bond Activation on Bimetallic Two-Atom Co-M Oxide Clusters Deposited on Zr-Based MOF Nodes: Effects of Doping at the Molecular Level
Density matrix renormalization group pair-density functional theory (DMRG-PDFT): singlet–triplet gaps in polyacenes and polyacetylenes

Catalysis

Featured publications:

Cerium Metal–Organic Framework for Photocatalysis
The Effects of Active Site and Support on Hydrogen Elimination over Transition-Metal-Functionalized Yttria-Decorated Metal–Organic Frameworks
Rationalizing the Reactivity of Bimetallic Molecular Catalysts for CO₂ Hydrogenation

Condensed phase systems

Featured publications:

Charge Model 5: An Extension of Hirshfeld Population Analysis for the Accurate Description of Molecular Interactions in Ground and Excited States in the Vapor and in Condensed Phases
Assessing Groups-Based Cutoffs and the Ewald Method for Electrostatic Interactions in Clusters and Saturated, Superheated, and Supersaturated Vapor Phases of Dipolar Molecules
Bond angle distribution of carbon dioxide in the gas, supercritical, and solid phases

Electronic structure theories

Featured publications:

Spin-State Ordering in Metal-Based Compounds Using the Localized Active Space Self-Consistent Field Method
Beyond Density Functional Theory: The Multiconfigurational Approach To Model Heterogeneous Catalysis
Multilink F* Method for Combined Quantum Mechanical and Molecular Mechanical Calculations of Complex Systems

Energy science and functional materials

Featured publications:

Boosting Photoelectric Conductivity in Porphyrin-Based MOFs Incorporating C60
Intramolecular Charge Transfer and Local Excitation in Organic Fluorescent Photoredox Catalysts Explained by RASCI-PDFT
Charge Transport in 4 nm Molecular Wires with Interrupted Conjugation: Combined Experimental and Computational Evidence for Thermally Assisted Polaron Tunneling

Functional theories

Featured publications:

Extended separated-pair approximation for transition metal potential energy curves
Scaling exchange and correlation in the on-top density functional of multiconfiguration pair-density functional theory: effect on electronic excitation energies and bond energies
State-Interaction Pair-Density Functional Theory Can Accurately Describe a Spiro Mixed Valence Compound

Monte Carlo algorithms & force fields

Featured publications:

Ab Initio Derived Force Fields for Predicting CO₂ Adsorption and Accessibility of Metal Sites in the Metal-Organic Frameworks M-MOF-74 (M = Mn, Co, Ni, Cu)
AMOEBA Force Field Parameterization of the Azabenzenes
Efficient methods for including quantum effects in Monte Carlo calculations on large systems: Extension of the displaced points path integral method and other effective potential methods to calculate properties and distributions

Nuclear fuel and actinides

Featured publications:

Quantum Chemical Characterization of Single Molecule Magnets Based on Uranium
From Transition Metals to Lanthanides to Actinides: Metal-Mediated Tuning of Electronic Properties of Isostructural Metal–Organic Frameworks
Volatility Differences in Actinide and Lanthanide N,N-Dimethylaminodiboranates as CVD Precursors: A DFT Study

Quantum chemistry

Featured publications:

OpenMolcas: From Source Code to Insight
Parametrization of Combined Quantum Mechanical and Molecular Mechanical Methods: Bond-Tuned Link Atoms
Quantum-Chemical Characterization of the Properties and Reactivities of Metal–Organic Frameworks

Reaction dynamics

Featured publications:

A semiempirical effective Hamiltonian based approach for analyzing excited state wave functions and computing excited state absorption spectra using real-time dynamics
Structure, Dynamics, and Reactivity for Light Alkane Oxidation of Fe(II) Sites Situated in the Nodes of a Metal–Organic Framework
Structure and dynamics of Zr6O8 metal–organic framework node surfaces probed with ethanol dehydration as a catalytic test reaction

Separations

Featured publications:

Metal–Organic Frameworks with Metal–Catecholates for O₂/N₂ Separation
Design of a Metal-Organic Framework with Enhanced Back Bonding for Separation of N₂ and CH₄
CO₂ Adsorption in M-IRMOF-10 (M = Mg, Ca, Fe, Cu, Zn, Ge, Sr, Cd, Sn, Ba)

Small-molecule activation

Featured publications:

Methane functionalization by an Ir(III) catalyst supported on a metal–organic framework: an alternative explanation of steric confinement effects
Quantum Chemical Characterization of Structural Single Fe(II) Sites in MIL-Type Metal Organic Frameworks for Oxidation of Methane to Methanol and Ethane to Ethanol
Beyond the Active Site: Tuning the Activity and Selectivity of a Metal–Organic Framework-Supported Ni Catalyst for Ethylene Dimerization

Solvent effects

Featured publications:

Electronic Absorption Spectra and Solvatochromic Shifts by the Vertical Excitation Model: Solvated Clusters and Molecular Dynamics Sampling
Generalized Born Solvation Model SM12
Uniform Treatment of Solute-Solvent Dispersion in the Ground and Excited Electronic States of the Solute Based on a New Uniform Solvation Model

Research

Research Overview

Featured Publications by Research Area

Biomass and plastics pyrolysis

Catalysis

Condensed phase systems

Electronic structure theories

Energy science and functional materials

Functional theories

Monte Carlo algorithms & force fields

Nuclear fuel and actinides

Quantum chemistry

Reaction dynamics

Separations

Small-molecule activation

Solvent effects

Full list of publications

CTC Highlights

Research

Research Overview

Featured Publications by Research Area

+ Biomass and plastics pyrolysis

+ Catalysis

+ Condensed phase systems

+ Electronic structure theories

+ Energy science and functional materials

+ Functional theories

+ Monte Carlo algorithms & force fields

+ Nuclear fuel and actinides

+ Quantum chemistry

+ Reaction dynamics

+ Separations

+ Small-molecule activation

+ Solvent effects

Full list of publications

CTC Highlights

Biomass and plastics pyrolysis

Catalysis

Condensed phase systems

Electronic structure theories

Energy science and functional materials

Functional theories

Monte Carlo algorithms & force fields

Nuclear fuel and actinides

Quantum chemistry

Reaction dynamics

Separations

Small-molecule activation

Solvent effects