On Wed, 1 Nov 1995 13:14:45 -0500 Ken Paul said:
>Has anyone heard of or seen any problems under MPE/iX 5.0
>C.50.00 where a father process is waiting for the son to wake
>him up and the son is waiting for the father to wake him up and
>both processes are hung?
>
>This happened at a user site two times and then the third time
>it did not happen. (Third times a charm!)
>The two processes had been communicating back and forth for
>more than 15 minutes before this happened.
 
This can happen on any release depending on what you are doing.  If the
ACTIVATE is invoked while the process is alive (prior to SUSPEND, or
whatever) this can occur.
 
I would suggest you look into using a local RIN to synchronize things.
The SUSPEND call can specify a RIN to be unlocked when you suspend.  How
you implement the RIN depends on what you're trying to do, so I can't
elaborate without more details.
 
[\] Jeff Kell <[log in to unmask]>