Thank you George for the comment.  I was able to point to the correct license server and able to run the FSI simulation. It completed the required time steps, and gave a message "System coupling run completed successfully".  However, afterwards it gave an error message "Update failed for the Solution component in System Coupling. The coupled update for system Transient Structural thew an exception.  Unable to determine if file .../dp0/global/MECH/SYS.mechdb is open. Connection refused" (Please see the attached image).  Any suggestion how to fix this. Thank you.