Error when clicking "Where Am I?" (signpost) icon: System.FormatException: Guid should contain 32 digits with 4 dashes...

Version 2

    Problem

     

    If you click the signpost "Where Am I?" icon from the toolbar when viewing an Incident (or Problem, Task etc) you receive the following error:

     

    System.FormatException: Guid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).

     

    Solution

     

    Open the process in Process Designer and check its validity.  Make sure there are no actions that shouldn't be there or aren't linked to anything else.  Fix these then re-save/re-activate the process.