Mass retirement workflow is hanging in 'In Process' status

[Monis]

Dear all,

I have an issue while running FI-AA workflow : mass
retirement workflow (WS00000025).
When running the worklow and already completed step
'Correct work
queue' and 'Release work queue', in step 'Execute work
queue' the
workflow is just hanging in 'In Process' status and
never in 'Complete' status.
In the workflow log of this workflow, there's no error
at all.

On the other hand, I found out that everytime we run
the mass
retirement workflow, there's always another work item
type exist called work queue. In the log of this work
item, there are error messages:
- 'No administrator found for the task' in action
'Reserved work item replaced'.
- 'Execution of the work queue failed' in action
'Executing work queue'
- 'Work item & cannot be read' in action
'FIND_BY_WIID'

I've already tried using transaction SWU_OBUF to solve
the first error message, but it didn't work.

Could you please help me to solve these errors?
Thanks in advance for your help.

Regards,
Monis

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com