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Core dump on Opteron but not Athlon

Question asked by hepplewhite on Nov 1, 2012

Can anyone help plz:

My fortran77 code compiles & builds using default options with openf90 - the executable runs on my Athlon II but causes core dump with an illegal instruction

on my Opteron 248. Both systems are built with fedora c17 and are otherwise identically built - the opteron is clearly the old machine - but is

needed because it will be my main number cruncher. I have not found any suggestions on the blogosphere. I thought about trying to install

core dump and crash reporter but have no experience. Could anyone suggest what I might do to track down the problem and get up and running.

thank you