<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">I don't quite understand why it would wait and then finally start, but I would certainly not run the mpdboot and mpiexec programs at the same time, as you are doing with '&'. what happens if you do instead:<DIV><BR class="khtml-block-placeholder"></DIV><DIV> mpdboot -n 2</DIV><DIV> mpdtrace</DIV><DIV> mpiexec -n 2 process</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>or </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV> mpdboot - 2; mpiexec -n 2 process &</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Rusty</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR><DIV><DIV>On Dec 21, 2006, at 5:16 PMDecember, Shaun Q wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Monaco; min-height: 19.0px"><BR></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Monaco; min-height: 19.0px"><BR></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Monaco" size="4" style="font: 14.0px Monaco"><SPAN class="Apple-converted-space"> </SPAN>When I try doing that with 2 machines though...</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Monaco" size="4" style="font: 14.0px Monaco"><SPAN class="Apple-converted-space"> </SPAN>mpdboot -n 2 &; mpiexec -n 2 process &</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Monaco" size="4" style="font: 14.0px Monaco"><SPAN class="Apple-converted-space"> </SPAN>It hangs for about 5 minutes and then starts up.</FONT></P> </BLOCKQUOTE></DIV><BR></DIV></BODY></HTML>