Changing the License
If you have received a new license file — for example, when adding COMSOL products to an existing license — replace the current license file with the new one. Double-check the contents of this file to make sure it lists the products that the license includes. See also The License Feature Names.
When the license file has changed, you must restart the license manager or reread the license file; otherwise, it continues to use the old license file still in memory.
restarting the license manager
To restart the license manager, follow these steps:
1
In the Windows Start menu, choose COMSOL Multiphysics 6.4 > COMSOL Launchers > LMTOOLS.
2
In the FlexNet Control Panel, click, in this order, Stop Server and Start Server.
obtaining a hostid
If you need to verify the hostid of the license server, you can follow the steps for Obtaining the Hostid. Alternatively, if COMSOL is already installed on the license server, you can determine the hostid by running the lmhostid command
COMSOL64/Multiphysics/license/win64/lmutil lmhostid
The hostid is typically the Ethernet address (also called a MAC address) of the network card. An Ethernet address has six bytes, each with two hexadecimal digits, giving a hostid with twelve hexadecimal digits. Alternatively, the hostid can be the volume serial number of your C hard drive. The volume serial number has 4 bytes, each with two hexadecimal digits, giving a hostid with eight hexadecimal digits.