From: Yuri Ivanov <yivanov@media.mit.edu>
Newsgroups: comp.parallel.pvm
Subject: Strange group server problem solved...
Date: Tue, 25 Aug 1998 18:57:00 -0400
Organization: MIT Media Lab
Message-Id: <35E3413C.E48D9173@media.mit.edu>
References: <35E1CE7B.C726C21C@media.mit.edu>
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As expected, the answer was simple, but I wish it was obvious. 

As I wrote in the previous message, pvmgs and libpvm were switching to
the system context before communicating in pvm_joingroup(). That was
actually the problem because this was the difference (one of...?)
between PVM 3.4 beta4 and PVM 3.4 beta6. Beta4 didn't use to switch
there. The installation on one side of the domain boundary used beta4,
while the other used beta6. So, as beta6 switched the context and sent
the message, beta4 was waiting for it to come in the old context and
vice versa.

-Y