End condition for step unexpectedly fulfilled

[Mike Pokraka]

Hi Kjetil, 

I've had mixed success with EX. I think a zero value counts as existence.
The difference in container terms is whether an entry for a variable exists
in the container table with a value of 0, or whether it's missing
completely. Combining that with a system parameter may be asking for
trouble. It's quite possible that in some internal code during the condition
job it populates it with 0, which would be technically correct but will also
result in an existence. 

Cheers, 
Mike

-----Original Message-----
From: sap-wug-bounces at mit.edu [mailto:sap-wug-bounces at mit.edu] On Behalf Of
Kjetil Kilhavn
Sent: 06 May 2008 04:52
To: SAP Workflow User Group
Subject: End condition for step unexpectedly fulfilled

This has been posted in SDN as well.

I have a workflow step where the user should create a new purchase order.
This 
step is making me scratch my head now.

In the custom method (extension to BUS2081) I clear parameter BES before 
calling transaction ME21N. 

After transaction execution MEGUI_PROCESS_PO (memory ID) is checked. If it 
does not give me a result I check parameter BES. If there is still no result

I wait a few seconds (in a finite loop, increasing wait) before checking 
MEGUI_PROCESS_PO and BES again.

This looks fine. It works too. The result parameter of the method is defined

with reference to EKKO-EBELN. The end condition says the result must exist 
(&_Wi_Result& EX).

However, I am currently looking at a case where the step has continued
without 
being executed again. The technical workflow log shows me that execution
took 
place at 11:16:57 with the result "Work item cannot be completed -> end 
condition is 'incorrect'". 
Then, at 11:20:02 the end condition is fulfilled, but no-one has executed
the 
work item - so how can the RESULT parameter have been changed?

I have found that a purchase order was created just 15 seconds before the
end 
condition was fulfilled. So apparently a completely unrelated incident can 
influence the end condition. That isn't nice....

Any ideas?
-- 
Kjetil Kilhavn (+47 40220607)
Blue Consulting AS (http://www.bluec.no/)
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