>>Every module is indepently tested and proven to work as designed. Most of the problems I run into are related to bad data.
>
>Good.
>So if some module has CASEs and/or IFs and/or loops with early exit possibilities, do you test ALL CASEs, ALL possibilities of IF/ELSE/ENDIF and both full and early-exit loops?
>From what you've said here, I'd say that you do.
>
>Thanks

Absolutely, however, with my personal coding standards, there are two rules that I follow which make the work simpler than otherwise might be the case.

First: No premature exits of iteration structures. If an exit is required that's predicated on a logical condition, then a DO WHILE...ENDDO loop is used.

Second: Each module has one, and only one exit point, namely the last line.