Found it. Constraint manager, select all diff pairs, right-click, delete. Works well. -----Original Message----- From: Andrew Noonan Sent: Thursday, April 07, 2005 11:14 AM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Diff Pair Unassign In release 15.2, is there any way to globally unassign Diff_Pairs? I have hundreds that I want to regenerate automatically using Logic>Assign_DIFFERENTIAL_PAIR. It's a great tool for assigning automatically, but unassigning is a different story. Also, with the new net types, there's no DIFF_PAIR property on the net. Thanks, Andrew Noonan Sr. PCB Designer Topspin Communications (w)650-316-3398 (c)650-814-3677