about mask.gs

[Guilherme Martins]

hi all

  well, I need some help, I'm trying to use mask.gs but I'm having some problems with it. I'm using a ".ctl" file.

  when i run it i receive the message

  --> non-numeric args to numeric operation
  --> erro ocurred on line 40
  --> in file mask.gs

  help me...

  thanks

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