"Single-task message" OWB Wait

I Search the net for the wait event "single-task message" got below information on

http://www.toadworld.com/KNOWLEDGE/KnowledgeXpertforOracle/tabid/648/TopicID/WE200/Default.aspx

"When running single task, this event indicates that the session waits for the client side of the executable."

I found that, if the mapping is in "invalid state" is called in the process flow then the process flow will hang forever and we get "single-task message" wait in the v$session table.

"invalid state" means = Mapping is working fine , then we change it but not able to deploy.



Hope this will someone .


Cheers
Nawneet