The Zemax Knowledgebase is moving!
On August 1, 2025, our articles will only be available on Ansys Optics. As they become available, use the new URL listed at the top of an article to update your bookmarks.Note: Ansys Optics is in English only. If a translation is available on an individual article, it will be listed below the article title.
- Solving errors when accessing an Ansys network license
- How to troubleshoot Red or Green USB license issues (Zemax Legacy)
- How to troubleshoot softkey license issues (Zemax legacy)
- Troubleshooting license issues with Black USB key licenses
- What to do if the graphics windows in OpticStudio are black or blank
- Troubleshooting your OpticStudio installation
