My OEM expectation is that if there are unpopulated sites they remain virgin. I also agree that it would be very very prudent of the OEM to document the depop sites and to write language on the module documentation that depopulated footprints shall not have any material added (paste; epoxy) to the pads. Then I would definitely expect a call if they were accidently pasted. For 2 versions of the same base board with different component adds (depop; pop some; pop all ...) I would expect the OEM to have either different part numbers or different version numbers; whatever their system and one the EM understands the implications of. So, question from the OEM to the EMs: is this a big deal? why? Valerie --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------