When running simulations across multiple Windows computers on a local network network, the resource configuration settings must be set to use MPICH2, rather than the default MS MPI.
See: https://kb.lumerical.com/en/index.html?installation_and_setup_resource_configuration.html

With this change, it will be necessary to manually provide your username and password to MPICH2, so it can login to the other machines to start the simulations.

Open the MPICH2 utility:

• > Start > All Programs > Lumerical > MPICH2 > Set MPICH2 username and password
• Enter the username and password you will use to login to all of the Windows computers
• Click on Register
• Click on OK
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A post was split to a new topic: Running simulations remotely on Linux from Windows