I don't believe Allegro has ever been backwards compatible. Once you open (and save) either a board, symbol drawing etc. in a new version, you then cannot open it in a previous version. That is why when we decide to move up to the latest and greatest version, we are sure about it and don't look back. Good luck! Gary E. MacIndoe PCB Design Engineer Advanced Micro Devices, Inc. Longmont, Colorado -> -----Original Message----- -> From: Vivekananda R K - CTD, Chennai [mailto:vivekanandark@xxxxxxxxxxx] -> Sent: Thursday, April 07, 2005 1:53 AM -> To: icu-pcb-forum@xxxxxxxxxxxxx -> Subject: [PCB_FORUM] how to open allegro15.2 libraries in 14.2 allegro -> -> -> -> Hi, -> -> I tried to open 15.2 Allegro libraries in 14.2 Allegro.I am not -> at all able -> to -> open.Please clear me how to do? -> -> Regards -> K.Vivek -> Pcb Designer -> Hcl Technologies -> chennai -> India -> DISCLAIMER -> This message and any attachment(s) contained here are -> information that is confidential, proprietary to HCL Technologies -> and its customers. Contents may be privileged or otherwise -> protected by law. The information is solely intended for the -> individual or the entity it is addressed to. If you are not the -> intended recipient of this message, you are not authorized to -> read, forward, print, retain, copy or disseminate this message -> or any part of it. If you have received this e-mail in error, -> please notify the sender immediately by return e-mail and delete -> it from your computer -> -> ----------------------------------------------------------- -> To subscribe/unsubscribe: -> Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx -> with a subject of subscribe or unsubscribe -> -> To view the archives of this list please login at -> //www.freelists.org. Our list name is icu-pcb-forum -> or go to //www.freelists.org/archives/icu-pcb-forum/ -> -> Problems or Questions: -> Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx -> -> Want to post a job listing ? DON'T DO IT HERE! -> Better yet, join our jobs listing forum. -> -> SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx -> POST: icu-jobs-forum@xxxxxxxxxx -> ----------------------------------------------------------- -> -> ----------------------------------------------------------- To subscribe/unsubscribe: Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx with a subject of subscribe or unsubscribe To view the archives of this list please login at //www.freelists.org. Our list name is icu-pcb-forum or go to //www.freelists.org/archives/icu-pcb-forum/ Problems or Questions: Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx Want to post a job listing ? DON'T DO IT HERE! Better yet, join our jobs listing forum. SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx POST: icu-jobs-forum@xxxxxxxxxx -----------------------------------------------------------