for your first question, if you aer using Non-sequental Mode then you could find MEMs directly under the NS object list, The DLL version is used in sequential mode alone! BtKor6ba
+_bxza(ma{
For your 2nd Q, like the upstairs's reply, the STEP files should be saved under ZEMAX\Objects\CAD Files. 2 @T~VRy
Fo;:GX,b
Hope this would help :)