You can do this and it is very easy. If this is a bus, then extract one net of the bus into sigxp to create an ecset. In sigxp got to Set->Constraints and open the Relative Propagation Delay tab. Just enter the rules and pinpairs you need and you are good to go. Take a look at the online documentation there is a tutorial with movies that I strongly recommend to see. <cdsroot>\doc\cmtutbe\goldenboards\movies If that is not enough let me know. I wrote an hands-on tutorial which recently was distributed to attendies of a local event. I can get you a copy if needed. Andy ;-) "Abel, Shannon K." <shannon.abel@xxxxxxx> 02/18/2005 12:30 PM Please respond to icu-pcb-forum@xxxxxxxxxxxxx To <icu-pcb-forum@xxxxxxxxxxxxx> cc Subject [PCB_FORUM] Trying to match length of pin pairs of same net We are having a serious identity crisis. We have a need to match lengths of two nets leaving a processor and arriving at a sdram chip at two locations. Need this trace to split at point a and arrive a point b & c at the same time. These lengths between points a-b & a-c need to be matched lengths. How can we do this in allegro 15.2. Thanks for all your help. Shannon Abel PWB Designer / Detailer <<test.bmp>>