With FlexNet 9.2, why do I receive a MathWorks Licensing Error 15 when trying to checkout a license key from a distant location or over a wide area network (WAN)?

The license server is in a different network location than the client. I am able to checkout the licenses for release R12, but get the following error message when starting MATLAB release 14 and above:

ERROR: License checkout failed. Cannot connect to license server. MathWorks Licensing Error 15.

Answer 1

[MathWorks Support Team]

This is a known issue with FLEXnet 9.2 and versions slightly higher than it. If you are receiving this error over a WAN and the Network License Manager is running, see the workaround below:

By default, the client sends a request to the server and if it can't complete the connection within 100000 microseconds, the client returns error 15.

To workaround this issue, you can extend the timeout period by setting the "FLEXLM_TIMEOUT" environment variable on the client machine. For example:

set FLEXLM_TIMEOUT=2147483647 

Assign any value within the range 0 through 2147483647 microseconds. The default setting is 100000 microseconds.

As an alternative, you can change the license manager port to a number outside the range 27000-27009. This timeout value is only used when the port used to communicate with the server is in the range 27000-27009.

To specify a different port number, change the port address in the license.dat file on the license server to 27010 or higher. The SERVER line should look like the following:

SERVER <hostname> <hostid> 27010