Index: lang/python/tremolo/indications/normalized.py
===================================================================
--- lang/python/tremolo/indications/normalized.py (revision 32149)
+++ lang/python/tremolo/indications/normalized.py (revision 32262)
@@ -40,5 +40,5 @@
 			self.__s = s
 			self.__initRange()
-		else: raise TypeError("the variable 'start' is not valid.")
+		else: raise AttributeError
 	start = property(getStart, setStart)
 	
@@ -48,5 +48,5 @@
 			self.__e = e
 			self.__initRange()
-		else: raise TypeError("the variable 'end' is not valid.")
+		else: raise AttributeError
 	end = property(getEnd, setEnd)
 	
@@ -61,5 +61,5 @@
 		if issubclass(i.__class__, Indication):
 			self.__indication = i
-		else: raise TypeError
+		else: raise AttributeError
 	indication = property(getIndication, setIndication)