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! ^=wG#!#V"1 vGC^1AM For your 2nd Q, like the upstairs's reply, the STEP files should be saved under ZEMAX\Objects\CAD Files. quU%9m
\S` Y2w 9]:J Hope this would help :)
