Guilin Sun
Ansys Employee


I am sorry to hear this. You may try:

1: copy all object but not the FDTD , and then paste to a new project, add new FDTD region and modify the setting.

2: if it still does not work, you may need to restart your computer.

3: You may also install the newest version.

A note for your simulation file: make sure that waveguides extend outside of PML (left side).

If the problem perisits, please send us an email for support, attach your file, and mention this post.