From: Panagiotis Melas Newsgroups: comp.parallel.mpi Subject: MPI_GATHER bug for linux? Date: Sun, 30 Aug 1998 17:19:35 +0000 Organization: University of Southampton Message-Id: <35E989A6.D531E75F@ecs.soton.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hello everybody, I used to run an mpi program on a cluster of SUNs and that was ok, but when I try to run the same program over a linux cluster I get the following problem: 1 - MPI_GATHERV : Invalid datatype argument: Datatype is MPI_TYPE_NULL [1] Aborting program! The call to that mpi function actually it is using two different datatypes for the sending and the recieving processes: MPI_Gatherv(CC,nn[0]*nn[1],MPI_FLOAT,C,countc,dispc,typec,0,comm_2D); Is there any fix for that problem please? P. Melas pm95r@ecs.soton.ac.uk