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! 8q^}AT<C
(` *BZ_
For your 2nd Q, like the upstairs's reply, the STEP files should be saved under ZEMAX\Objects\CAD Files. |N)Ik8
>y3FU1w5d
Hope this would help :)