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Fatal error: Uncaught Error: Call to a member function previous() on null in /home/kmccar6/repository.netecweb.org/application/models/Output/ItemAtom.php:235 Stack trace: #0 /home/kmccar6/repository.netecweb.org/application/models/Output/ItemAtom.php(81): Output_ItemAtom->_getFeedLinks(Array) #1 /home/kmccar6/repository.netecweb.org/application/views/scripts/items/browse.atom.php(2): Output_ItemAtom->__construct(Array) #2 /home/kmccar6/repository.netecweb.org/application/libraries/Omeka/View.php(114): include('/home/kmccar6/r...') #3 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/View/Abstract.php(889): Omeka_View->_run('/home/kmccar6/r...') #4 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(912): Zend_View_Abstract->render(NULL) #5 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(933): Zend_Controller_Action_Helper_ViewRenderer->renderScript('items/browse.at...', NULL) #6 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(972): Zend_Controller_Action_Helper_ViewRenderer->render() #7 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Controller/Action/HelperBroker.php(277): Zend_Controller_Action_Helper_ViewRenderer->postDispatch() #8 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Controller/Action.php(527): Zend_Controller_Action_HelperBroker->notifyPostDispatch() #9 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('browseAction') #10 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http)) #11 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(106): Zend_Controller_Front->dispatch() #12 /home/kmccar6/repository.netecweb.org/application/libraries/Zend/Application.php(384): Zend_Application_Bootstrap_Bootstrap->run() #13 /home/kmccar6/repository.netecweb.org/application/libraries/Omeka/Application.php(73): Zend_Application->run() #14 /home/kmccar6/repository.netecweb.org/index.php(23): Omeka_Application->run() #15 {main} thrown in /home/kmccar6/repository.netecweb.org/application/models/Output/ItemAtom.php on line 235