>Gerry-
>
>>"Theoretically" it is possible to have bug free code. Given enough time, _anything_ is possible; eg. "Big Bang".
>
>Nope. Impossible to _prove_. Impossible to test in all contexts on all systems under all conditions. Even your example. However, I did qualify my comments to Jim by saying a program of sufficient complexity to be useful.

I'll give you a function that's possible to prove that may look impossible. Try this (very simple)

FUNCTION AddTwo
  LPARAMETERS tnOne, tnTwo

  RETURN tnOne + tnTwo
ENDFUNC