In Access 2002 VBA, what datatype can be used to limit the precision of a double result? - ms-access

Question

I'm performing a calulation that results in a floating point number. When I try and write it to a Access field, I get this error:
Run-time error '3759': Scaling of decimal value resulted in data truncation
I've intentionally limited the access field to a fixed precision. I was hoping that the value would be automatically truncated, but instead it's throwing this error - how can I explicitly change the precision of the value in VBA to avoid this error?
Code:
value = X / Y
With myTAble
.AddNew
!calc = value
.Update
End With

Answer 1

You could try using VBA's Round function, as in:
!calc = Round(value, 2)
Replace the 2 with however many decimal places you want.
Depending on the scale and precision of your numbers, you might still encounter the 3759 error if Round returns a value that cannot be expressed exactly as a Double floating point number (and so ends up having more decimal places than you asked for). A more robust approach might be to use something like:
!calc = CDec(FormatNumber(value, 2))
Replace the 2 with however many decimal places you want.
FormatNumber will round the number and convert it to a string (with only the number of decimal places that you specify), and CDec will convert the string into a Decimal.

Answer 2

How about this:
value = X / Y
With myTAble
.AddNew
!calc = Fix(value*10^decimalPlaces)/10^decimalPlaces
.Update
End With
Where decimalPlaces is the number of decimal places that you wish to work with.
Fix truncates the number. If you wish some kind of rounding, try Clng.