[antlr-interest] Getting the wrong token during lexing with Antlr 3.3

[Bernardo Elayda]

Hi,

I have a very simple grammar that I'm using to process a csv.
In that csv, I have defined the following token:

NUM : '0'..'2'+

This rule works fine but when the token is 1-character long and the
'0' value, the lexer doesn't classify '0' as NUM!  I know this is
happening because I pulled the tokens out of CommonTokenStream and
examined the token types used. When the token is 1-charactrer long and
the '0' value, it is classifying it as some machine generated token
not explicitly defined in my grammar. I'm sure I'm doing something
wrong.  Do I have another rule in my lexer that is causing the
conflict?

tia,
Bernardo