>gdb --pid=core.5383 Are you sure about the syntax? PID must be a running process. I see --core which seems to be relevant here.
Both OpenMPI and Siesta were compiled with O flags. This is not appropriate for gdb. Should I compile both of them with debug symbols? >Btw, did you compile lapack and friends by yourself ? I use Scalapack which need BLAS. I use OpenBLAS instead of netllib's BLAS? $ gdb --core=core.5383 .... Try: yum --enablerepo='*-debug*' install /usr/lib/debug/.build-id/e1/ddc85f7caa9f2571545a58479d64ba676217dd [New Thread 5383] [New Thread 5416] [New Thread 5401] [New Thread 5388] [New Thread 5407] [New Thread 5406] [New Thread 5418] [New Thread 5393] [New Thread 5391] [New Thread 5387] [New Thread 5405] [New Thread 5389] [New Thread 5408] [New Thread 5417] [New Thread 5394] [New Thread 5506] [New Thread 5404] [New Thread 5392] [New Thread 5410] [New Thread 5411] [New Thread 5395] [New Thread 5409] [New Thread 5403] [New Thread 5414] [New Thread 5396] [New Thread 5412] [New Thread 5419] [New Thread 5413] [New Thread 5509] [New Thread 5415] [New Thread 5397] [New Thread 5420] [New Thread 5398] [New Thread 5399] Core was generated by `/share/apps/siesta/siesta-4.0/tpar/transiesta'. Program terminated with signal 4, Illegal instruction. #0 0x00000000008da76e in ?? () (gdb) bt #0 0x00000000008da76e in ?? () #1 0x00000000008da970 in ?? () #2 0x0000000000bfe9f8 in ?? () #3 0x0000000000000000 in ?? () (gdb) Regards, Mahmood
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