Clearing and setting Lumerical cache

Ansys Lumerical products generate temporary files inside the cache folder. You may want to clear these files to free space on your computer, or to remove current login information.

Cache folder location

Lumerical product cache are in the following folders.

On Windows:

\AppData\Local\cache\Lumerical

On Linux:

~/.cache/Lumerical

For product versions older than 2025 R2.3, the cache folders are as follows.

On Windows:

\AppData\Local\Lumerical

On Linux:

Lumerical cache files are in two locations, 

/tmp

where Lumerical files start with lumerical-cache-<id>, with <id> being a string of numbers and letters, and

~/.cache/Lumerical

You can delete files from these locations to free up space on the computer as needed, and it will not impact normal operation.

Changing cache folder size and location

Starting in 2025 R2.3, you can change the cache folder size and location by modifying variables in the Shared.ini product preference file.

In the Shared.ini file, add the following lines to change the cache location. If the section [Cache] already exists, add the variable under the existing section. Replace <directory_to_cache> with your desired directory.

[Cache]
dir=<directory_to_cache>

You can also modify the default cache size using the size variable. Similarly, append to the existing [Cache] section if already exists, and replace <size> with your preferred value in MB. The default value is 500 MB.

[Cache]
size=<size>