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how to append a constraint with cstCreateConstraint

WTony

Hi,

I want to append a constraint "minOppExtension" in my techfile. So I'm using cstCreateConstraint to do it.

techID = techGetTechFile(ddGetObj("Tech"))

cutClass_CG=cstFindConstraintGroupIn(techID "group1")

cstCreateConstraint(cutClass_CG "minOppExtension" list("M2" "V1") list(0.0 0.0) list('cutClass list(0.04 0.04)) t t)

it return nil

What is wrong with my code

it should be like that in the techfile

constraintGroups(


 ;( group [override] [definition] [operator] )
 ;( ----- ---------- ------------ ---------- )
  ( "group1" nil    nil    'and

    orderedSpacings(
     ( minOppExtension            "M2" "V1"  'cutClass  (0.04 0.04) (0.0 0.0))
    ) ;orderedSpacings
  ) ;group1
) ;constraintGroups

Thanks

Parents

  • Do you have a cutClass with (0.04 0.04) dimensions defined in the cutClasses section of the tech file? If not, it won’t add the constraint and you should see something like:

    *WARNING* (CST-5305): Illegal cut class value (0.4 0.4) specified. Specify a legal value.

    If I give a legal value (i.e. a pair of values for which there is a cutClass defined for the via layer in question) then I can successfully add the constraint using the code you gave.

    Regards,

    Andrew.

Reply

  • Do you have a cutClass with (0.04 0.04) dimensions defined in the cutClasses section of the tech file? If not, it won’t add the constraint and you should see something like:

    *WARNING* (CST-5305): Illegal cut class value (0.4 0.4) specified. Specify a legal value.

    If I give a legal value (i.e. a pair of values for which there is a cutClass defined for the via layer in question) then I can successfully add the constraint using the code you gave.

    Regards,

    Andrew.

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