Custom design rule for Differential pair

[albin]

I haven’t tried this myself yet, but maybe the answer is in this thread?

[solved] Custom differencing rule not working [DRC]

I am trying to make a rule to control each differential pair in each different layer, however following the documentation I do not find any result [image] This is an example to comply with the documentation. (version 1) (rule “space between tracks” (condition “A.inDiffPair(‘USB’) && AB.isCoupledDiffPair()”) (constraint diff_pair_gap(min 0.35mm)) ) As you can see the tracks belong to a differential pair (USB_P and USB_N), however this rule does not apply. but if I use the condition (’…