defstruct issue

Hi ,

I use defstruct to define a variable

defstruct(var1 label msg)

If I Recall The Function Its Giving Warning

*WARNING* defstruct: Redefining Structure var1.

I will give u a simple example script:

Input File (test.txt):

M2 width=0.34um length=0.5um
M3 width=0.34um length=0.5um

script:

procedure(mytest(fileName)
      prog( ()
          inFile = infile(fileName)
          defstruct(struct width length) ; giving warning here
          setq(tabel (makeTable 'layers 0))
          while(gets(line inFile)
              lineInList = parseString(line " \n")
              tabel[nth(0 lineInList)] = make_struct(?width nth(1 parseString(nth(1 lineInList) "=")) ?length nth(1 parseString(nth(2 lineInList) "=")))
               )
          )
     )
mytest("./test.txt")