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! a_`E'BkgU
*O)_D
bj
For your 2nd Q, like the upstairs's reply, the STEP files should be saved under ZEMAX\Objects\CAD Files. |n}W^}S5
-=Q_E^'
Hope this would help :)