Differential Pairs (Custom Rules)

[josem]

Hi: I checked a lot of examples about routing differential pairs in KiCad but now I am using KiCad 7 and find it hard to define “layer” in custom rule. Look at the picture: If I use F.Cu or B.Cu there is no error, but when I write a specific inner layer like ln2.Cu or ln3.Cu or ln4.Cu … gives me compilation error. Only works if I write “layer inner” but obviously I want to select different diff.pairs parameters for different layers! Could anyone tell me how to solve this?
I also tried the condition A.Layer == ‘ln3.Cu’ … but still Not working.
Thank you!

[paulvdh]

First, are those layers actually enabled?

Second, watch your spelling, between i and I and l and L
When zooming in, the first letter of “ln.Cu” looks like the first letter of layer, while it should be a captial i, not an L.

Linux uses a bit different font:

Copied as textt:

layer
Layer
inner
Inner

in.Cu
In.Cu
ln.Cu
Ln.Cu

[JamesJ]

Along with Paul’s advice, I’d recommend upgrading to v8 too. There are various fixes in (or coming in the next minor version) for that kind of thing.

[josem]

Thanks! It works now …