>>>For instance if a prg contains
>>>
>>> IF .T. && or
>>>
>>> do while .T.
>>> messagebox('hi mom',4,"that's all")
>>>
>>> return
>>>
>>>you don't get any errors, until you run the prg. There are other tools which do a better job in *checking* snippets, tables, etc. before a problem is found much later, as was the case with my table including a field named *left*.
>>>
>>>FWIW, Kim
>>
>>I just tried your code in both FPW 2.6 and VFP 5.0 and both caught the errors.
>
>This is very odd, VFP 5.0 caught the error when you compiled??? This prg when compiled does not catch any errors.
>
>*!* temp.prg
>
>**IF .T. && or
>
>do while .T.
>messagebox('hi mom',4,"that's all")
>
>return
>
>
>Yet, when run there is a Nesting error.
>
>Would you mind checking this again? Have you applied any patches or upgrades to 5.0?
>
>Thanks, Kim

Yup...VFP 5.0 catches this. It tells me nesting error. I copied the code from the message and then pasted it to a new PRG, then selected compile from the menu.

Craig