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I recently use MPICH2 to write parallel code.
But when I run wmpiexec.exe in bin\ I received this:
Please specify an authentication passphrase for smpd:
what is going on here?
You need to register your username and password, (your windows username and pass) using:
StartMenu->All Programs->MPICH2->wmpiregister.exeAlso ensure that you installed the smpd in Administrator mode.