Thank you, Bidisha.
I want use different WIs to different manual activities. I have two WI for one process and want to change from one (A) WI to another WI (B), then go back to (A).
When this happens, a process couldn't go back to (A) WI once (B) was shown. The process was stuck and couldn't go anywhere. That's what I've got now.
Can you see what is the problem?
Takafumi