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Workflow "Error Occurred" Message

Posted By:      Posted Date: September 01, 2010    Points: 0   Category :SharePoint
Hi, We have upgraded a VS 2008 custom workflow in our production environment but we are now seeing an "Error Occurred" message when starting in one site that the workflow is activated on.  It works fine on another site.  Permissions DID NOT change for users on this site before or after or during the upgrade of the workflow. It works fine in our test environment. How can I troubleshoot this in production environment (I cannot debug)? Can somebody give me a definite answer on what are the required permissions to give user to allow them to start workflows and edit only their own Tasks?  I have asked this question on a number of forums with no definitive answer.

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