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Good Afternoon, 

  • Product: Premium Subscription SUL
  • License Number: L123561
  • Expiration: Friday, December 9, 2022

The above is my information. However, I had my Zemax OpticStudio but then a notification popped up  

“Zemax key not found” 

then I restarted computer and now it is directing me to the Zemax License Manager version. 

When I put in the same License  Number and activation code, it fails because it is not a new license. I never transferred it so I do not know why  it got removed since I got until Dec 09, 2022. 

This is what I now see when I click the application 

 

Does anyone have suggestions or a solution? 

Thank you in advance.

 

Very Respectfully, 


Talaya S. White

 

Hello! 

The most common fixes when a license stops working / showing up are covered in this knowledge base article:

https://support.zemax.com/hc/en-us/articles/1500005488741-How-to-troubleshoot-softkey-license-issues#unable-to-view-a-previously-activated-license-0-3

 

Let us know if you need any more help!

Best Regards,

Don D


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