Sim Commander Community Q&A


Welcome to our new question & answer style forum. We hope this new format will help you to rapidly find answers to common usage and configuration questions. 

Please ask well formed questions and up vote answers that you find helpful. This forum is NOT for  bug submissions or instances where customer support is required.  Non-conforming posts will be rejected to preserve the integrity of this resource for future users.

Problem 'You do not have a valid license or have failed to log in'

Keith Windsor

The question has been closed for reason: Requires Support - Please open ticket at:

Bernard Villers Jr
on 11/20/2023 10:35:07

Has anyone else experienced this error when trying to launch Sim Commander 4.5?

I get a blank white screen, and a message window appears on top of it saying


'You do not have a valid license or have failed to log in'

I DO have a valid license, but I cannot fathom why this is happening. Any ideas would be greatly appreciated. I'll try installing an older version perhaps.

Thanks for any ideas