Dale, Perhaps the design was created using software from a UK company called Labcenter Electronics. It seems they have a schematic capture tool called ISIS that appears to create filenames with a .dsn extension. Chris ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx on behalf of Dale Rasmusen Sent: Fri 12/21/2007 3:18 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] .dsn file: any readers available? All, A customer delivered a design with a .dsn extension. This should be a PCB design file of some origin, but what reader do I use to evaluate? I have tried to go through Allegro to see if Specctra can read it but it can't. It is not an Orcad schematic file either. Any clues? Thanks, Dale Rasmusen CAD Manager TEKNOVUS (707) 665-0400 ext 133 (707) 665-0491 fax ----------------------------------------------------------- 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 go to //www.freelists.org/archives/icu-pcb-forum/ Problems or Questions: Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx -----------------------------------------------------------