ExplicitVariables

[paolo mazza]

I just installed Rev 4.5 in macosx 10.5.8
Trying to use this piece of code

on mouseUp
   set the explicitVariables to false

   put 1 into UNO
   answer UNO
end mouseUp

I get this error:

button "Button": compilation error at line 4 (Chunk: can't create a variable
with that name (explicitVariables?)) near "UNO", char 10

How can I fix this? Any idea?

Thanks a lot.

Paolo Mazza