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Hello,



I have on ongoing problem with Zemax. I am using a Windows 10 64-bit laptop. I recently upgraded to Zemax 21.1.1, but this problem also existed when I was using the last version (20.3?).



The first few times after I install Zemax, the program opens fine. After that, something happens and double clicking the shortcut on my desktop doesn't launch Zemax (or in C:\Program Files\Zemax OpticStudio). For example, just today Zemax crashed while I was editing a file. Now the program will not re-open. Even after restarting the computer Zemax fails to launch. Is this a known issue? Is there any type of work around?



I have reinstalled Zemax about 10 times, once every few weeks when I need to use the program. Any help you have to offer is much appreciated.



Thanks



Julian

Hi Julian



Sorry to read that you are experiencing issues using our software. No this is not a known issue.


We have an article that describes a few things that you can do to help: https://my.zemax.com/en-US/Knowledge-Base/kb-article/?ka=KA-01512#stoppedworking. Basically we recommend running the prerequisites and then checking the Visual C redistributables, to ensure everything is properly installed. If this doesn't help, please open a case with us and our IT specialist will be able to help you: https://my.zemax.com/en-US/support/cases/create-case/



Sandrine

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