Workflow Error – An unexpected error has occurred while opening the workflow.

Workflow Error – An unexpected error has occurred while opening the workflow. See the event log on the AOS and contact your system administrator to resolve the issue

SOLUTION:

• Refresh WCF in client configuration:
• In Administrative Tools select AX 2012 Configuration
• in Configuration Target select Business Connector (non-interactive use only)
• In Configuration create new configuration if you only have the original,
• click on Connection tab, then click on Refresh configuration.
• Stop AOS service
• Delete files in Xppil (files ONLY, don’t delete the folders inside Xppil)
• C:\Program Files\Microsoft Dynamics AX\60\Server\(your dev. repo. name)\bin\XppIL
• Start AOS
• Generate Full CIL
• Data dictionary synchronize

     

     Hopefully, following the steps above will get rid of the error for you as well, good luck