An internal error occurred. FlexNet internal error.

Reason: There is a problem with the Tekla license server installation.

Solution: This error can often be fixed by performing the steps below:

1. Uninstall all existing Tekla license server installations.
2. Check that all the files are deleted from the Tekla license server installation folder: .. \Tekla\License\Server.
3. Install the latest Tekla license server. Check for the latest version in Tekla Downloads.