License.lic Matlab //free\\ -

The file license.lic is the standard filename used for the license file required to activate and run MathWorks products, including MATLAB. This plain text file acts as a digital key, containing encrypted information that dictates which toolboxes you are allowed to use, how many users can access the software simultaneously, and the expiration dates of your license.

Common Errors & Fixes

❌ “License Manager Error -15”

1. Environment Variable: Set LM_LICENSE_FILE=27000@myserver.company.com
2. Licensing File (thin client): Create a file named network.lic (or license.lic) containing only:

   SERVER myserver.company.com ANY 27000
   USE_SERVER
   

   Place this in your local licenses/ folder.

Feature Lines: Specific products like Simulink or the Statistics and Machine Learning Toolbox.

Managing licenses

• Start/stop license server: use lmgrd and vendor daemon controls (lmutil commands such as lmstat, lmreread, lmdown).
• Point MATLAB to a different license: set MLM_LICENSE_FILE (Windows: system environment variable or MATLAB shortcut; Unix: export MLM_LICENSE_FILE=27000@server).
• Convert node-locked to network or renew: coordinate with MathWorks licensing support or your license administrator.

Conclusion

Depending on your setup, this file serves two distinct purposes: