>>>>I am trying to do a [replace all] for cField = ***** (Numeric overflow) but I get a error cause ***** has no quotes and isn't a number
>>>

>>>... for cField>val(replicate('9',fsize('cField')))
>>>

>>>bye
>>
>>This wont work if the field has decimals, ie N(10,3)
>
>You're right.
>
>>

>>PROCEDURE maxval
>>LPARAMETERS size, dec
>>LOCAL cNum
>>cNum = REPLICATE('9', dec)
>>cNum = "." + m.cNum
>>cNum = REPLICATE('9', m.Size - (m.dec + 1)) + m.cNum
>>RETURN VAL(m.cNum)
>>

>
>Since size and dec must be passed as arguments to the function, this is hardly a general approach. In fact, knowing that information, it would be simpler to hardcode the value in the scope expression (like Caroline suggested).
>
>Strangely, VFP seems to not have a function to give you the precision of a numeric field, or am I missing something?
>
>bye

AFIELDS gives some info, and there are a few more that I cant think of off the top of my head.
But by passing the Size and Dec you can use this for more then just a field of an opened database. Making it a general approach.
If I was doing something with checking for overflows, I would no doubt do an AFIELDS()
then Loop through that, take the size and precision, pass it into the above code, and then replace for myField > maxVal, though it isnt the best way to do the replacement either, replace for locks the entire table if im not mistaken.