Dear all, I want to run an example on windows in parallel, after installation MPICH2 and Putting smpd.exe & mpiexec.exe in the directory, when i write : mpiexec -np 1 -localonly lmp_win_mpi -in in.melt everything is working fine! (e.g: after passphrase for smpd, it run on single processor) but when i write: mpiexec -np 2 -localonly lmp_win_mpi -in in.melt does not work.(e.g after passphrase, does not run and stops! and does not issue any error). Please help me. Thank you Yasti