@Pavana,
1 FDTD solve license allows running a simulation up to a maximum of 32 cores as shown here. Ensure that you are submitting your simulation job with the "job scheduler submission script" to run the job on the cluster compute nodes and not on the login node. Depending on your simulation and requirements, you can accelerate the run time by increasing the number of processes used to run the simulation as shown here. 1 FDTD solve license will be checked out for each increment of 32 processes/cores running the simulation job.
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