Hi Gary, In order to include the package lengths in a component you need to add them to the packages section of the schematic symbol. These values will then appear in the Pin Delay columns. Rgrds Peter Hughes, PCB Designer, Concurrent Technologies, 4 Gilberd Close, Newcomen Way, Colchester, Essex, CO4 4WN. Tel: +44 1206 752626 Fax: +44 1206 751116 -----Original Message----- From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Macindoe, Gary Sent: 18 April 2007 15:44 To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Relative prop delay Hey guys, It has reached the point where I have to consider the package length when matching some nets. I am using Relative Propagation Delay in CM, and was wondering if anyone knows how to include the package lengths? I thought maybe the Pin Delay columns, but they are grayed out. Any ideas? Regards, Gary Gary E. MacIndoe PCB Design Engineer Fort Collins, Colorado amd.com gary.macindoe@xxxxxxx