I had done this the last time support worked with me on this issue. As of right now, I had a workflow fail about an hour ago:
2/14/2011 1:56 PM Comment AssignedPrintDesigner is now <domain>\<print designer user>
2/24/2011 3:21 PM Comment Error in request data action. Unauthorized attempt to update collect data task by <domain>\<accounting user>,. The response has not been recorded. Error
2/24/2011 3:21 PM Error System Account
An error has occured in Display, Line Ad, Inserts, Advertorial Workflow.
I just ran the tool again and this is what resulted:
C:\Util>CheckGroup.exe http://dockets "Accounting Members" <domain>\<accounting user>
Is user a member of the group: True
The ULS log contains the following with regards to this:
02/24/2011 15:21:05.53 OWSTIMER.EXE (0x0E60) 0x0EE0 Windows SharePoint Services Workflow Infrastructure 88xr Unexpected WinWF Internal Error, terminating workflow Id# cd3f91c5-cd02-47bc-8008-dca407f9dfad
02/24/2011 15:21:05.53 OWSTIMER.EXE (0x0E60) 0x0EE0 Windows SharePoint Services Workflow Infrastructure 98d4 Unexpected Nintex.Workflow.NWHumanApprovalException: Unauthorized attempt to update collect data task by <domain>\<accounting user>,. The response has not been recorded. at Nintex.Workflow.HumanApproval.CollectDataFromUserTask.ProcessResponse(User user, String comment, Outcome outcome, Int32 taskListItemId) at Nintex.Workflow.Activities.SetupCollectDataActivity.AfterOnTaskChanged(Object sender, ExternalDataEventArgs e) at System.Workflow.ComponentModel.Activity.RaiseGenericEvent[T](DependencyProperty dependencyEvent, Object sender, T e) at System.Workflow.Activities.HandleExternalEventActivity.RaiseEvent(Object args) at System.Workflow.Activities.HandleExternalEventActivity.System.Workflow.ComponentModel.IActivityEventListener<System.Workflow.ComponentModel.QueueEventArgs>.OnE...
02/24/2011 15:21:05.53* OWSTIMER.EXE (0x0E60) 0x0EE0 Windows SharePoint Services Workflow Infrastructure 98d4 Unexpected ...vent(Object sender, QueueEventArgs e) at System.Workflow.ComponentModel.ActivityExecutorDelegateInfo`1.ActivityExecutorDelegateOperation.Run(IWorkflowCoreRuntime workflowCoreRuntime) at System.Workflow.Runtime.Scheduler.Run()
Any additional info that might help? To reiterate, this is very intermittent. Most of the time, workflows sail on through for these users without problem. Just once in a while (~3 times a week), this gums up the works.