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! X7tBpyi
Z=a~0&G
For your 2nd Q, like the upstairs's reply, the STEP files should be saved under ZEMAX\Objects\CAD Files. kcMg`pJ4<
^D ;EbR
Hope this would help :)