Hi Julian, I assume you mean On-line DRC checking. I don't think so, you have to go into Setup -> Constraints... and set On or Off at the top. For the long list of commands that can be executed from the command line: Tools -> Utilities -> Keyboard Commands Have a good one! Gary E. MacIndoe PCB Design Engineer Fort Collins, Colorado amd.com gary.macindoe@xxxxxxx ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Julian Ungureanu (jungurea) Sent: Wednesday, October 31, 2007 5:29 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] DRC check on/off Is it possible to turn ON /OFF DRC check from the command prompt? Allegro 15.5.1 Thanks, Julian