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

There might be other solutions besides this one, but these are the steps i followed to solve the error above. I am using AX 2012 R3 CU8, and special thanks to my co-worker (Anja) who helped me with this 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 🙂

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