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You can start the graphical user interface (GUI) of COMSOL in a batch interactive job with X11 forwarding. This can be useful to change your COMSOL preferences or to prepare a model or check the result of a COMSOL job. Please follow the description from the wiki page about batch interactive jobs with X11 forwarding to start an interactive job.

Afterwards, you can load one of the COMSOL modules

module load comsol/5.2

and finally start the GUI with the comsol command.

comsol -np 1

If the COMSOL GUI runs slow through X11, then please have a look at the troubleshooting section of this wiki page. Don't start the COMSOL GUI on a login node, as login nodes only have few resources and are shared by many users.