Reply To: unable to calcualte mode expansion

[Lito]

Running Lumerical script or Python API scripts will always require a GUI/Desktop connection to the Linux machine. GUI/CAD related computations cannot be done without a GUI connection/interface. You can only run the simulationfile.fsp directly from the terminal/command line in Linux.

The error indicates that you are missing the library, ‘libglut.so.3’ — required by Lumerical on Linux systems. Please install the required libraries/packages for your system. 

See this KB for a complete list of the required packages for your Linux distribution. >> Required libraries for Ansys Lumerical on Linux – Ansys Optics