hi, after compiling when i try run a job(pw.x) in the folln machine: Orion:SGI Altix 350:Advanced Linux 2.1 :4 processors (Itanium 2 at 1.4 GHz, 3.0 MB L3 cache):10 GB it gives the error: forrtl: severe (174): SIGSEGV, segmentation fault occurred why is this msg appearing and how to get rid of it? thanks in advance, Jaita