Q100628: How to prevent lag and crashes on a Foundry license server

Pete

Updated: February 03, 2026 00:19

Created: January 20, 2026 15:58

SYMPTOMS

The RLM server begins to run slow or crashes when trying to float your licenses.

CAUSE

This can occur when there is a large back-log of old licenses or logs installed on the server. It can also happen if you have a large number of users accessing the server at a time.

RESOLUTION

Removing old licenses or logs
In order to resolve this issue please remove any old expired licenses and any large log files from the server machine via these steps:

1. First of all please ensure that you are running the latest build of the FLU available here.
   Note: If you are running on macOS/Linux, you may experience issues installing the server via FLU 8.1.6, please run 8.1.3 instead. This is available to download here:
   Mac FLU 8.1.3
   Linux FLU 8.1.3
   
   
2. Stop the server by opening the FLU, navigating to ‘License Server’ then selecting ‘Stop server’
3. Remove any old license files from the following paths:
   Windows: C:\Program Files\The Foundry\RLM and C:\ProgramData\The Foundry\RLM
   MAC: /Library/Application Support/TheFoundry/RLM
   Linux: /usr/local/foundry/RLM
   
   
4. Remove any .log files from this path:
   \TheFoundry\RLM\log
   
5. Re-install the latest valid licenses.
   Please contact sales@foundry.com if you would like your most recent licenses re-sent.
   

Server lag caused by a large number of users

If you have a very large number of licenses this can be taxing for your server and cause lag. In order to avoid this you can temporarily transfer a set of licenses from your main server to another machine on your network so they can be floated from there.

More information on this can be found here: Q100221: How to float some of your RLM licenses from another server on your network

FURTHER HELP

If you are still experiencing difficulties please create a support ticket to let us know the exact issue encountered and the troubleshooting steps that have been taken.
For more information on how to open a support request, please refer to this article: Q100064: How to raise a support ticket

FURTHER READING

More information about Floating licenses can be found in the articles below:

Q100602: Where to find more information about Floating licenses

Q100221: How to float some of your RLM licenses from another server on your network

Q100532: How to manage your license server using the Foundry Licensing Utility (FLU)