Dear MPICH.org, I recently tried to install MPICH2 on my Windows 7 64-bit machine using your binary version 1.4.1p1, and I had a small problem on the very last step (I followed the instructions given in http://swash.sourceforge.net/online_doc/swashimp/node9.html?). After installing the binary, I went to the command prompt and entered the following: smpd -install mpiexec -remove mpiexec -register mpiexec -validate smpd -status Every step worked fine, even changing the pass phrase, but the mpiexec -validate command returns FAIL. I tried reinstalling the package again, but I got the same result. My question is: is there a way to get more information about why the validation failed?? Thank you for your time, I look forward to your response. Sincerely, Joaquin P Noyola Graduate Teaching Assistant Department of Physics, UT Arlington