George Bosilca wrote: > You can start by adding --debug-daemons and --debug to your mpirun > command line. This will generate a lot of output related to the > operations done internally by the launcher. If you send this output > to the list we might be able to help you a little bit more.
OK, I added those, but got a message about needing to supply a suitable debugger. If I supply the "--debugger gdb" argument, I just get dumped into gdb. I'm not sure what I need to do next to get the launcher output you mentioned. My knowledge of gdb is pretty rudimentary. Do I need to set mpirun as the executable, and the use the gdb "run" command with the mpirun arguments? Do I need to rebuild openmpi with --enable-debug? ____________________________________________________________________________________ Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting