So let's say you take the snippet you posted above; all 25 lines. Add that semicolon after <STDIN>, and then execute the code. That exact snippet (with the semicolon fixed) fails for you?

I have to ask, because I tried just that; I downloaded your code, fixed the semicolon, and gave it a spin. It worked fine. I'm unable to duplicate the error message you're identifying when I run your code.