Hi, 

A colleague converted a CodeV file to a Zemax file. I am a Zemax user, the file won’t trace rays in Zemax . I get an error statement - “error in target, can’t lunch rays”. I went ahead to set vignetting in the field editor and try to trace rays again and now I get the statement - “error in target, missed surface 52”.  

since rays can’t be traced, no analysis can be done. What can I do to fix these errors? could this be a conversion problem from CodeV  to Zemax ? 

Assuming the problem is from the conversion, how do I fix this? 

Thank you.