Unable to connect license server

[chanaprom]

Dear all,
I am trying to connect QuantumATK2024.09 from a cluster to my license server installed in Windows. Unfortunately, I obtained the following error:

Cannot check out base license. SCL error message:
Cannot connect to license server system.
 The license server manager (lmgrd) has not been started yet,
 the wrong port@host or license file is being used, or the
 port or hostname in the license file has been changed.
FlexNet Licensing error:-15,570.  System Error: 115 "Operation now in progress"

Could you suggest some solutions to this problem, please? However, as I checked by installing QuantumATK on a computer that is on the same network, the license connection works well.

Thank you in advance!

[Anders Blom]

You probably need to ensure the relevant ports are open in any firewall between the client and the license server. In particular you need to accept incoming connections to the Windows machine on the server and vendor ports for TCP traffic. If this is not possible due to security rules etc, I would recommend placing a separate license server on the cluster itself.