Following error occurred: WD 472 - task definition not found

[Thad Gorbal]

Hello All -
 
I have been working on a little workflow in CRM 3.0.  I receive sometimes
WD 472 message (pls see below) while testing it. Other times (the same
day), the workflow works correctly.  In either case the link between the
event and receiver seems to be intact and active, according to SWETYPV and
binding for triggering events in PFTC.
 
 
"Error processing following event linkage:
BUS1006 CHANGED WS91200012
Following error occurred:
WD 472
WS91200012
Message text:
Task definition 'WS91200012' not found
Event container appended as attachment.
Event linkage with errors deactivated."
 
 
Any hint why the wf definiton cannot be found will be greatly appreciated.
 
Regards,
Thad