Hi Sonny You need to have some understanding of the Constraints Manager to start setting up constraints, the attached presentation will help you understand the CM basics.. SaravanaPCB Designersaravana_force10@xxxxxxxxx --- On Wed, 2/2/11, Sonny Mirador <smirador@xxxxxxxx> wrote: From: Sonny Mirador <smirador@xxxxxxxx> Subject: [PCB_FORUM] To: icu-pcb-forum@xxxxxxxxxxxxx Date: Wednesday, 2 February, 2011, 1:11 AM Anyone,I'm new on the constraint manager, I need to set constraint.I have scenario that I need to set constraint on a board that I'm working with?? A net is going from Fbga to 4 chip? 1st: constraint, pin pair From FBGA to the 1st chip.2nd: constraint,pin pair from chip1 to chip 43rd: constraint, from fbga to chip 4 which the total Length. Example will be appreciated.Thanks a lotSonny Mirador