I would like to define different routing via styles for BGA routing.
I would like to create rule for multi-layer via, and for top layer to layer 1.
In the layer stack manager/ drill pairs, I have the different drill pairs I can use.
And when I go to the design rules / routing / routing via style and I try to create the rule, I have a pop-up error saying "some rules have incorrect definitions". When I hover the rule, I see "Expression1 invalid".
Did I miss something for doing this ? Would someone know why I have the error while when I try with a net name, it works.