<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi,<div>I am running MPICH2v1.2 on a Mac with OS10.5.8 and the Intel Fortran compiler. I am trying to run a 1D hydro-AMR code that requires MPI although it only runs on a single processor (for reasons that are not relevant here). It compiled OK, but I am getting the following error when it runs:</div><div><br></div><div><blockquote type="cite"><div><font class="Apple-style-span" color="#000000">Assertion failed in file /Users/jtk/Downloads/mpich2-1.2/src/mpi/coll/helper_fns.c at line 337: 0</font></div><div><font class="Apple-style-span" color="#000000">memcpy argument memory ranges overlap, dst_=0x100802730 src_=0x100802730 len_=4</font></div><div><font class="Apple-style-span" color="#000000"><br></font></div><div><font class="Apple-style-span" color="#000000">internal ABORT - process 0</font></div><div><font class="Apple-style-span" color="#000000">rank 0 in job 8 gs67-hsdjkmac.gsfc.nasa.gov_63272 caused collective abort of all ranks</font></div><div><font class="Apple-style-span" color="#000000"> exit status of rank 0: killed by signal 9 </font></div></blockquote><div><font class="Apple-style-span" color="#144FAE"><br></font></div><div apple-content-edited="true"> <span class="Apple-style-span" style="font-size: 14px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Comic Sans MS'; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div>I tracked down the code subroutine where it is dying, and determined that it is calling the <span class="Apple-style-span" style="font-size: medium; ">helper_fns.c</span> program (which is part of the MPICH library) when an MPI send/receive is invoked. Unfortunately I am only a Fortran programmer not C, so the error message isn't telling me much. If anyone has an idea of what could cause such an error, please let me know. Thanks for your help!</div><div><br class="Apple-interchange-newline"><br></div><div>Judy Karpen</div><div>Code 674</div><div>NASA/Goddard Space Flight Center</div><div>Greenbelt, MD 20771</div><div>email: <a href="mailto:judy.karpen@nasa.gov">judy.karpen@nasa.gov</a></div><div><br></div><div>"For every problem there is one solution that is simple, neat, and wrong" -- H.L. Mencken</div><div><br></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"> </div><br></div></body></html>