Hiiiiiii I have a compiler for Fortran90 language that supports 32-bit architecture. I want to convert that compiler so that it can support both 32-bit and 64-bit architecture(say Opteron). What issues I need to take in consideration or what changes I should do in source code (Froint End or Back End)? Thanks & Regards, Arpit Looking for people who are YOUR TYPE? Find them at in.groups.yahoo.com