With FlexNet 9.2, why do I receive a license manager 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. License Manager 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