Constraints length in pcbnew 6.0

[erwan]

Hello,

I am preparing a re-routing of a card made under Kicad 5 with version 6.0. This one has constraints of lengths of tracks which I had held using an excel table. Under kicad 6, I hope to be able to use the constraint editor.

I did a test project, I get the following results:

Bottom: 17.97 compared to 19.1 (11.7 + 4 * 1.6 [via height])
DRC: 11.79

Is this normal, how is the calculation done?

Thank you,

[paulvdh]

My French is quite horrible, but I think you have set up some custom rule for a minimum length of 15mm, and DRC complains that it’s only 11.7875mm.

It’s probably also useful if you post your custom rule, instead of only the error message. I do not know much of this part of KiCad though.

[erwan]

Thanks for your reply,

Your right, i have setup a rule for a minimum length of 15mm
I don’t understand the discrepancy between the DRC length and the routed length (bottom line) for the same net.

The routed length seem to account for via heigth and not the DRC length.

For info my custom rule is :
(version 1)
(rule TEST
(constraint length (min 15mm) (max 17mm))
(condition “A.NetName == ‘/J2_*’”))

[craftyjon]

Could you please report a bug and attach your project (including the custom rules file)?

[erwan]

Done https://gitlab.com/kicad/code/kicad/-/issues/10135