Problem: Nintex Workflow tasks displays : * Item Not found error!
Root Cause: Workflows are initiated and items in which workflows ran, are deleted by the end-user. When I tried terminating the workflows, it gave “Server was unable to process the request –> Values does not fall within the expected range.” error message! When I tried opening the workflow task, got “Value does not fall within the expected range” Error!!
Use NWAdmin tool to terminate the tasks for deleted items. Here is how:
Go to the command prompt and enter,
CD “C:\Program Files (x86)\Nintex\Nintex Workflow 2007”
NWAdmin -o SyncTerminatedWorkflows -url https://sharepoint.company.com/finance/v3 -terminatedeleteditems
So, to avoid such issues, always terminate the workflow and then delete the items. Item not found may also occur when user doesn’t has at least read access on the item!