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MPICH2 64-bit and 32-bit library



I am on a 64-bit machine with 1-cpu and 4 core Intel CPU (Core i7 Nehalem).  I've compiled mpich2 and have it running charmm.  But I am having some errors when I try to run Firefly (wrong ELF class errors).  I have seen two recent posts about mpich2, and I realize I need 32-bit  My questions are:

(1) Will this problem go away if a 64-bit firefly is used?  Or is this really mpich problem?

(2) I have not seen a method to compile mpich2 with both 64-bit and 32-bit libraries, so can I just grab a 32-bit from another 32-bit machine?


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