Hi I have a (rather complex) OpenMPI application which works nicely. In the main file i have the function main(), in which MPI_Comm_size() and MPI_Comm_rank() are being called.
However, when i add a function check() to the main file, process 0 will crash in PMPI_Comm_size(), even when the function check() is not called! All other processes hang inside PMPI_Init(). The crash also occurs when the function check() is written after the function main The gdb stack trace for process 0: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1208715568 (LWP 10072)] 0x0016cb16 in PMPI_Comm_size () from /opt/openmpi/lib/libmpi.so.0 Current language: auto; currently c (gdb) where #0 0x0016cb16 in PMPI_Comm_size () from /opt/openmpi/lib/libmpi.so.0 #1 0x080c379d in main (iArgC=14, apArgV=0xbfc60bc4) at TDMain.cpp:22 Missing separate debuginfos, use: debuginfo-install gcc.i386 zlib.i386 (gdb) I am using OpenMPI 1.4.2 Has anybody got an idea how i could find the problem? Thank You Jody
