Hi Jeff/Paul, Thanks a lot for your replies.
I am looking into upgrading MPI to a newer version. As I use a few custom built libraries as part of my main parallel application that recommend the use of 1.1.2, I first need to check compatibility issues with the newer version before I can upgrade. Paul, The following is the output of ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited pending signals (-i) 268288 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 8192 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 268288 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited As I mentioned before, I am able to run it successfully with 997 processes around 6 out of 10 times with the rest failing. I tried with 500 processes and I do get the odd failure in that case too. Regards, Prasanna.
