Symptoms

We are seeing the error message below in our production environment, which uses InfoPath forms with K2 for SharePoint 2010.

A "24411 K2:DOMAINUSER from is not allowed to open the worklist item with SN=" error occurs when a user opens a worklist item

What, if any, are the possible causes for this error using InfoPath forms integration?
 

Diagnoses

The error message normally indicates one of two things:

i) This error could occur if the destination planning is configured for a group or if configured for more than one user, but only one slot is configured once one of the users in the destination set opens the worklist item, it becomes allocated to that user and any other user that tries to open that link will now see this error until the worklist item is released.

ii) The item is not assigned to the user that is trying to open the worklist item.

iii) If the worklist item doesn't exist (possible invalid serial number), user will run into this error message.
 

Resolution

The worklist item will need to be released by the user that has it open from his/her own worklist or from the worklist global management (K2 Workspace > Management > tServer:Port] > Workflow Server > Worklists).