--- a/plcopen/plcopen.py	Mon Jan 14 17:35:05 2008 +0100
+++ b/plcopen/plcopen.py	Mon Jan 14 17:35:32 2008 +0100
@@ -1554,7 +1554,7 @@
         return self.content["value"].getValue()
     setattr(cls, "getValue", getValue)
 
-def extractValues(self, values):
+def extractValues(values):
     items = values.split(",")
     i = 1
     while i < len(items):