>>>>>I figured this out. Change you ERROR metod

>>>>>FUNCTION Error
>>>>>PARAMETER nError,cMethod,nLine
>>>>><b>MESSAGEBOX('ErrorMethod')</b>
>>>>>RETURN TO ShowMessage

and run your code. You wouldn't see ErrorMethod message because COUNT FOR IRegion=lnRegion doesn't generate an error!
>>>>>
>>>>>To confirm it just run COUNT FOR IRegion=lnRegion from command window on any open table.
>>>>>You can use
>>>>
>>>>Yes, you are right. Count doesn't fire up an error. How could that be? I need it to fire on error. Do you know why this VFP function doesn't fire an error? It's amazing to see the reaction of the Count function.
>>>
>>>It's not only COUNT. I observe the same behavior with LOCATE and SUM. I would guess that any command with FOR clause works this way.
>>
>>I wonder if this is solved in VFP 7.
>
>Yes it fixed. The COUNT and LOCATE I tried returned "Variable 'LNREGION' is not found" error message.
>

In VFP7, does it fire the error on a table that contains a field named IRegion? IOW, did you run a COUNT FOR x=y statement against a table where the left side (x) was valid, but the right side (y) was invalid?