HELP: SKILL code not waiting for calculations

 Hello All,

I wrote short code to calculate the biggest the value for upper right x y and lowest vale of x y and then do subtraction to get the width and height:

my code is like:

 procedure(math(bBox corner)
let((x y tx ty)
x = car(caar(bBox))
y = cadr(caar(bBox))
 case(corner
 
  ("lower"
    foreach(s bBox
      tx = caar(s)
      ty = cadar(s)
      if(tx<x
      then
       x=tx
      );if-tx
      if(ty<y
      then
        y=ty
      );if-ty
    );foreach
   result = list(x y)
  );lower
 
    ("upper"
      foreach(s bBox
        tx = caar(s)
        ty = cadar(s)
        if(tx>x
        then
          x=tx
        );if-tx
        if(ty>y
        then
          y=ty
        );if-ty
      );foreach
     result = list(x y)
    );upper
   return(result)
   );case
  ) ; let
) ; procedure

  ll = math(cellView~>instances~>bBox "lower")
 ur = math(cellView~>instances~>bBox "upper")

w = car(ur) - car(ll)        ;Width

h = cadr(ur) - cadr(ll) ; height

viaParams = list(list("cutWidth" w) list("cutHeight" h) list("originOffset" list(w/2 h/2)))
b_db = dbCreateVia(cellView viaDef ll "R0" viaParams)

dbCreateStdVia: Zero width and/or height value(s) specified for a via cut

and then error:

dbTransformPoint: Invalid point - nil

What I think that SKILL is code is so fast that it doesn't wait for the conversion of all layouts and move to math function and since there is no layout there so It's not calculating width and height, If I manually creat layout and then just run the part of code where its calculating width and height, then its working fine , even This code is working fine with 1 technology (32nm) but not with 14nm.

 any suggestion on this ?

Thanks!