Hi, I frequently encounter this error message when trying to run a ZPL. I tried to narrow down the possible causes but could not successfully reproduce the error at all times. I am unsure what is triggering the error. Any guidance would be appreciated.
Cheers!
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/0d1321b5-1dab-4f7e-af10-87c44ac92d32.png)