Happy to help and thank you for sharing the screenshot! I believe the issue is that you have set the Semi-Diameter to 0 (fixed) for Surface 1. OpticStudio likely doesn't know what to do with this definition during the conversion. Real optics will have some diameter defined on both sides of the lens, and often these diameters are the same. Could you try giving this field a reasonable value? In addition, since you are not actually defining a Biconic surface on Surface 1 (all values are infinity or 0), then I would suggest simplifying the definition by just using the Standard surface type.
Let me know if it still gives you trouble.
Ethan
You are navigating away from the AIS Discovery experience