[antlr-interest] Problem running the tutorial

[Jonathan Prater]

Hi, I'm trying to work through the tutorial for ANTLR, and it's throwing 
this weird error at me at the end of the tutorial, as I step through the 
debugger with the input 2+3*4:  MismatchedTokenException(0!=0).  I see 
that error pop up in the parse tree of the debugger.  In the 
Interpreter, I see a NoViableAltException, instead.