workflow not executing in background WF-BATCH error

Hi ,

I'm really struck with workflow error when the task is processed in background mode ...

its saying WF-BATCH error.

i checked SWU3 everything is OK ...

but my workflow is working fine if the task is not executed in background mode....

What could be the possibility of WF-BATCH error while processing the task in backgound mode.?

Thanks in advance.

Thanks

-Suresh