Thank you Mangesh, I think the problem is that I cannot add the port to the Exception List on the cluster machine - I will try to fix this with the IT support at my university.

In the meantime, do you think is possible to run a script for Optislang on the HPC that will call and solve my simulations in the Workbench?

This is how my system looks like and I would like to run the DOE simulations of the Sensitivity block on the HPC cluster.