Clearance constraint between different netClasses

Layout
1

I try to define a clearance constraint between different net classes.
My custom rules is


(rule HV-_PHA
   # clearance between HV- and PHA tracks
   (constraint clearance (min 4.0))
   (condition "A.NetClass == 'HV-' && B.NetClass == 'PHA'"))

I just get the message "Could not compile custom design rules, but I can not find what is wrong with the syntax.

2

When I browse though the Syntax Help I see a difference in the use of quotation marks.

image
image1124×866 122 KB

Maybe you also want to add a wildcard to your netclass names.

3

image

4

Thanks for the reply. I found the syntax check button now. I added the missing dimensions (mm) but still get the ERROR “Missing version statement”. I don’t know what this means.

My rules is now:

(rule “HV-_PHA”

clearance between HV- and PHA tracks

(constraint clearance (min 4.0mm))
(condition “A.NetClass == ‘HV-’ && B.NetClass == ‘PHA’”))

5

I found out the correct syntax for my statement:

(version 1)
(rule “HV-_PHA”

clearance between HV- and PHA tracks

(constraint clearance (min 4.0mm))
(condition “A.NetClass == ‘HV-’ && B.NetClass == ‘PHA’”))

Thanks to ellik and paulvdh for the helpful hints.

1 Like
6

OMG! Thanks for finding out!
Why is this nowhere mentioned in the syntax help, that this “version” is mandatory somehow?!

7

This is described in the full documentation:

We could look to tweak the syntax help, but it’s not designed to be a comprehensive guide.