Cannot connect to license server system - FLEXnet licensing error -15, 10
Environment
Not environment-specific
Case:
I received the "Cannot connect to license server system" error received while working on Tekla Structures. What should I do?
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This is a common error that you might receive if you have the Tekla Structures licensing service installed/running on Windows Server 2003 and/or if you are using an old version of Tekla Structures License Server.
Solution:
You will need to have the recent version of Tekla Structures license server installed and running on one of the servers/computers with a supported operating system. You can find the latest hardware recommendations here.
If you have already the recent version of the license server installed on your server/computer that is supported, then check if the Tekla.lic file contents are matching with the error message, as the TCP/IP port or host name in the license file might have been changed. You can go through this article and apply the mentioned instructions under "Do the following steps on your server".
It would be a good practice also to configure your company's firewall settings in a way to allow the communication between the license server computer and the client workstation(s).