Newsgroups: comp.parallel.mpi From: "Steve T. Barnard" Subject: MPI_REQUEST_MAX Organization: NAS - NASA Ames Research Center, Moffett Field, CA Date: Wed, 27 May 1998 16:04:54 -0700 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <356C9C16.51C295AE@nas.nasa.gov> My program is failing with the error: Insufficient request entries. Please use MPI_REQUEST_MAX to increase your allocation. The current value of MPI_REQUEST_MAX is 16384 This is on an SGI Origin2000. I've increased the MPI_REQUEST_MAX environment variable to 65000, but that has no effect. I've found that 16384 is the maximum allowable. In any case, I don't consider that to be a proper fix, even if it would work. I'd like to put checks in my program so I never exceed the limit, but I don't understand what the nature of the error is. Can anyone explain it, and suggest how I can avoid it? Steve Barnard