<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello,<div><br></div><div>I'm using CitcomCU and am having a strange problem with problem either hanging (no error, just doesn't </div><div>go anywhere) or it dies with an MPI_Isend error (see below). I seem to recall having problems with the MPI_Isend </div><div>command and the lam-mpi version of mpi, but I've not had any problems with mpich-2.</div><div>On the new cluster we are compling with openmpi instead of MPICH-2.</div><div><br></div><div>The MPI_Isend error seems to occur during Initialization in the call to the function mass_matrix, which then </div><div>calls exchange_node_f20, which is where the call to MPI_Isend is.</div><div><br></div><div><div>--snip--</div><div>ok14: parallel shuffle element and id arrays</div><div>ok15: construct shape functions</div></div><div><div>[farm.caes.ucdavis.edu:27041] *** An error occurred in MPI_Isend</div><div>[farm.caes.ucdavis.edu:27041] *** on communicator MPI_COMM_WORLD</div><div>[farm.caes.ucdavis.edu:27041] *** MPI_ERR_RANK: invalid rank</div><div>[farm.caes.ucdavis.edu:27041] *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)</div><div><br></div><div><div>Has this (or these) types of error occurred for other versions of Citcom using MPI_Isend (it seems that CitcomS uses</div><div>this command also). I'm not sure how to debug this error, especially since sometimes it just hangs with no error.</div><div><br></div><div>Any advice you have would be hepful,</div><div>Magali</div><div><br></div><div><br></div></div></div><div><div apple-content-edited="true"> <div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>-----------------------------</div><div>Associate Professor, U.C. Davis</div><div>Department of Geology/KeckCAVEs</div><div>Physical & Earth Sciences Bldg, rm 2129</div><div>Davis, CA 95616</div><div>-----------------</div><div><a href="mailto:mibillen@ucdavis.edu">mibillen@ucdavis.edu</a></div><div>(530) 754-5696</div><div><b>-----------------------------</b></div><div><b>** Note new e-mail, building, office</b></div><div><b> information as of Sept. 2009 **</b></div><div>-----------------------------</div></div></div></div> </div><br></div></body></html>