what module did you upgrade? What else has changed in your script? Can you provide a small snippet that illustrates the problem? I also wonder if this is a case of buffering -- try putting $|=1; towards the top of your script (if that solves it, see The extremely simple buffering tutorial (really just an example) for more information).
Comment on Re: PerlApp or module change cuts print output!
That is the problem, I don't know what I upgraded! I have been making additions to the code every day, and whist at one point the console window would show the print output, a few builds later it would not. Thanks for the buffering suggestion, I will try that.