VerifyError: Error #1025 or Error from hell

i was trying to read an XML with namespaces and then Flash throw me this weird error

VerifyError: Error #1025: An invalid register 3 was accessed


then we found that was beacuse of these lines (locally declared in a function)

1
2

var ns = ttXML.namespace();
default xml namespace = ns;

the error comes when you try to call some function after those lines in your code

the solution that we found was declare ns variable outside of the function
and then everything works fine =D