This error occurs when the vendor daemon, MLM, is unable to communicate with the Network License Manager, lmgrd.
To resolve this issue, ensure the following:
- The path to MLM in the Network License Manager's license file is correct
- The TCP port used by MLM is unblocked
- Antivirus and security software are not preventing MLM from running
- Firewalls using deep packet inspection (such as with Zscaler) are not blocking License Manager traffic even if network tests pass; try allowing all traffic or disabling deep packet inspection to resolve the issue.
If you're unsure which port MLM is using and would like to set a static port, please visit the MATLAB Answer below.
What ports does the Network License Manager use, and how can I set those ports?
