application/logs/errors.log details are as follows
2018-04-21T23:44:37+05:30 WARN (4): Omeka_Storage_Adapter_Filesystem: Tried to delete missing file ‘original/15908099b331aa07f569f9dd71ccf2a4.png’.
2018-04-21T23:44:37+05:30 ERR (3): Omeka_File_Derivative_Exception: Failed to execute command: ‘/usr/bin/convert’ ‘/tmp/15908099b331aa07f569f9dd71ccf2a4.png[0]’ -auto-orient -background white +repage -flatten -thumbnail ‘800x800>’ ‘/tmp/fullsize_15908099b331aa07f569f9dd71ccf2a4.jpg’. in /home/ekamalai/earpkmi/application/libraries/Omeka/File/Derivative/Strategy/ExternalImageMagick.php:210
Stack trace:
#0 /home/ekamalai/earpkmi/application/libraries/Omeka/File/Derivative/Strategy/ExternalImageMagick.php(48): Omeka_File_Derivative_Strategy_ExternalImageMagick::executeCommand(’’/usr/bin/conve…’, NULL, NULL, NULL)
#1 /home/ekamalai/earpkmi/application/libraries/Omeka/File/Derivative/Creator.php(76): Omeka_File_Derivative_Strategy_ExternalImageMagick->createImage(’/tmp/15908099b3…’, ‘/tmp/fullsize_1…’, ‘fullsize’, 800, ‘image/png’)
#2 /home/ekamalai/earpkmi/application/models/File.php(356): Omeka_File_Derivative_Creator->create(’/tmp/15908099b3…’, ‘15908099b331aa0…’, ‘image/png’)
#3 /home/ekamalai/earpkmi/application/models/Job/FileProcessUpload.php(22): File->createDerivatives()
#4 /home/ekamalai/earpkmi/application/libraries/Omeka/Job/Dispatcher/Adapter/Synchronous.php(25): Job_FileProcessUpload->perform()
#5 /home/ekamalai/earpkmi/application/libraries/Omeka/Job/Dispatcher/Default.php(137): Omeka_Job_Dispatcher_Adapter_Synchronous->send(’{“className”:"J…’, Array)
#6 /home/ekamalai/earpkmi/application/models/File.php(203): Omeka_Job_Dispatcher_Default->send(‘Job_FileProcess…’, Array)
#7 /home/ekamalai/earpkmi/application/libraries/Omeka/Record/AbstractRecord.php(280): File->afterSave(Array)
#8 /home/ekamalai/earpkmi/application/libraries/Omeka/Record/AbstractRecord.php(548): Omeka_Record_AbstractRecord->runCallbacks(‘afterSave’, Array)
#9 /home/ekamalai/earpkmi/application/models/Item.php(336): Omeka_Record_AbstractRecord->save()
#10 /home/ekamalai/earpkmi/application/models/Builder/Item.php(203): Item->saveFiles()
#11 /home/ekamalai/earpkmi/application/libraries/globals.php(567): Builder_Item->addFiles(‘Upload’, ‘file’, Array)
#12 /home/ekamalai/earpkmi/application/models/Item.php(321): insert_files_for_item(Object(Item), ‘Upload’, ‘file’, Array)
#13 /home/ekamalai/earpkmi/application/models/Item.php(231): Item->_uploadFiles()
#14 /home/ekamalai/earpkmi/application/libraries/Omeka/Record/AbstractRecord.php(280): Item->beforeSave(Array)
#15 /home/ekamalai/earpkmi/application/libraries/Omeka/Record/AbstractRecord.php(529): Omeka_Record_AbstractRecord->runCallbacks(‘beforeSave’, Array)
#16 /home/ekamalai/earpkmi/application/libraries/Omeka/Controller/AbstractActionController.php(229): Omeka_Record_AbstractRecord->save(false)
#17 /home/ekamalai/earpkmi/application/controllers/ItemsController.php(88): Omeka_Controller_AbstractActionController->editAction()
#18 /home/ekamalai/earpkmi/application/libraries/Zend/Controller/Action.php(516): ItemsController->editAction()
#19 /home/ekamalai/earpkmi/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch(‘editAction’)
#20 /home/ekamalai/earpkmi/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#21 /home/ekamalai/earpkmi/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(105): Zend_Controller_Front->dispatch()
#22 /home/ekamalai/earpkmi/application/libraries/Zend/Application.php(384): Zend_Application_Bootstrap_Bootstrap->run()
#23 /home/ekamalai/earpkmi/application/libraries/Omeka/Application.php(73): Zend_Application->run()
#24 /home/ekamalai/earpkmi/admin/index.php(28): Omeka_Application->run()
#25 {main}
2018-04-21T23:45:27+05:30 WARN (4): Omeka_Storage_Adapter_Filesystem: Tried to delete missing file ‘original/26cc9182014fa952923a3a65ba292a46.png’.
2018-04-21T23:45:27+05:30 ERR (3): Omeka_File_Derivative_Exception: Failed to execute command: ‘/usr/bin/convert’ ‘/tmp/26cc9182014fa952923a3a65ba292a46.png[0]’ -auto-orient -background white +repage -flatten -thumbnail ‘800x800>’ ‘/tmp/fullsize_26cc9182014fa952923a3a65ba292a46.jpg’. in /home/ekamalai/earpkmi/application/libraries/Omeka/File/Derivative/Strategy/ExternalImageMagick.php:210
Stack trace:
#0 /home/ekamalai/earpkmi/application/libraries/Omeka/File/Derivative/Strategy/ExternalImageMagick.php(48): Omeka_File_Derivative_Strategy_ExternalImageMagick::executeCommand(’’/usr/bin/conve…’, NULL, NULL, NULL)
#1 /home/ekamalai/earpkmi/application/libraries/Omeka/File/Derivative/Creator.php(76): Omeka_File_Derivative_Strategy_ExternalImageMagick->createImage(’/tmp/26cc918201…’, ‘/tmp/fullsize_2…’, ‘fullsize’, 800, ‘image/png’)
#2 /home/ekamalai/earpkmi/application/models/File.php(356): Omeka_File_Derivative_Creator->create(’/tmp/26cc918201…’, ‘26cc9182014fa95…’, ‘image/png’)
#3 /home/ekamalai/earpkmi/application/models/Job/FileProcessUpload.php(22): File->createDerivatives()
#4 /home/ekamalai/earpkmi/application/libraries/Omeka/Job/Dispatcher/Adapter/Synchronous.php(25): Job_FileProcessUpload->perform()
#5 /home/ekamalai/earpkmi/application/libraries/Omeka/Job/Dispatcher/Default.php(137): Omeka_Job_Dispatcher_Adapter_Synchronous->send(’{“className”:"J…’, Array)
#6 /home/ekamalai/earpkmi/application/models/File.php(203): Omeka_Job_Dispatcher_Default->send(‘Job_FileProcess…’, Array)
#7 /home/ekamalai/earpkmi/application/libraries/Omeka/Record/AbstractRecord.php(280): File->afterSave(Array)
#8 /home/ekamalai/earpkmi/application/libraries/Omeka/Record/AbstractRecord.php(548): Omeka_Record_AbstractRecord->runCallbacks(‘afterSave’, Array)
#9 /home/ekamalai/earpkmi/application/models/Item.php(336): Omeka_Record_AbstractRecord->save()
#10 /home/ekamalai/earpkmi/application/models/Builder/Item.php(203): Item->saveFiles()
#11 /home/ekamalai/earpkmi/application/libraries/globals.php(567): Builder_Item->addFiles(‘Upload’, ‘file’, Array)
#12 /home/ekamalai/earpkmi/application/models/Item.php(321): insert_files_for_item(Object(Item), ‘Upload’, ‘file’, Array)
#13 /home/ekamalai/earpkmi/application/models/Item.php(231): Item->_uploadFiles()
#14 /home/ekamalai/earpkmi/application/libraries/Omeka/Record/AbstractRecord.php(280): Item->beforeSave(Array)
#15 /home/ekamalai/earpkmi/application/libraries/Omeka/Record/AbstractRecord.php(529): Omeka_Record_AbstractRecord->runCallbacks(‘beforeSave’, Array)
#16 /home/ekamalai/earpkmi/application/libraries/Omeka/Controller/AbstractActionController.php(229): Omeka_Record_AbstractRecord->save(false)
#17 /home/ekamalai/earpkmi/application/controllers/ItemsController.php(88): Omeka_Controller_AbstractActionController->editAction()
#18 /home/ekamalai/earpkmi/application/libraries/Zend/Controller/Action.php(516): ItemsController->editAction()
#19 /home/ekamalai/earpkmi/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch(‘editAction’)
#20 /home/ekamalai/earpkmi/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#21 /home/ekamalai/earpkmi/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(105): Zend_Controller_Front->dispatch()
#22 /home/ekamalai/earpkmi/application/libraries/Zend/Application.php(384): Zend_Application_Bootstrap_Bootstrap->run()
#23 /home/ekamalai/earpkmi/application/libraries/Omeka/Application.php(73): Zend_Application->run()
#24 /home/ekamalai/earpkmi/admin/index.php(28): Omeka_Application->run()
#25 {main}