Lito
Ansys Employee

@martinmi,

Please see this Knowledge Base (KB) article. Also ensure that you have write access to the “/tmp” folder on your Linux box.

To troubleshoot the issue — try running the example python script below (lumtest.py) from the Lumerical CAD/GUI using our bundled Python3.

import lumapi
fdtd = lumapi.FDTD()
fdtd.addfdtd()
fdtd.addring()
fdtd.addmesh()
fdtd.save("mytestpy.fsp")