Reply To: unable to calcualte mode expansion

[Guilin Sun]

It is difficult to give solutions based on the error message from Python. Maybe it is due to the difference of opration system? what OS you are using? what kind of device is this? does the mode expansion work directly from the file wihtout using python? I would suggest that you use a simple straight waveguide with ports, first do direct simulation, then use Python script.   we need to isolate the possible issues.