>>Do I think it is possible to produce zero-bug software? Yes, I do,
>
>I disagree, and so does the rest of the professional software testing industry. You can hit a piece of code 10K times, and it may be the 10K+1th time that it fails. You can do code coverage and think that a piece of code is unreachable, but your customer will find a permutation that reachs that code. In a complex system, there are enough possible permutations that you could spend a lifetime testing it.

Isn't that the truth bro! Well said.

I have a web app (VFP + Web Connect) running for 3 years. Suddenly, this week a user complaints that "the app broke". It was downloading reports in PDF and XLS format to the client fine. Now it wants to download HTML only. What changed? They upgraded their browser from IE 5.5 to IE 5.5 with a much later build. Sheesh!

(Assuming you know the answer - and I love to find a fix for this - don't answer here as it does not belong in this thread. I'll post a new message elsewhere. This was just for illustration).