Since the latest Zemax update my files no longer work when I conduct a ray trace, all my files crash terminating Zemax.  I’ve rolled back to 23.1 and I can do a ray trace again without my files crashing (sometimes because I saved the file in 23.2 and it changed something in the file older versions of Zemax don’t like), but I have now run across another issue.

When I do a ray trace I get “NA” for pixel values on both surface and rectangular detectors.  Does anyone have any experience seeing this?  Is it something I have changed that could cause this?