>>>Can anyone tell me why the following code used to work (under VFP50) and now, all of a sudden, gives me an error message "Operator/operandi mismatch" ? The underlying field is formatted for datetime and I haven't changed anything else (that I'm aware of) to cause this sudden refusal to work syndrome! Century is set on. Thanks in advance.
>>>
>>>IF !EMPTY(THIS.Value) < DATETIME()
>>> = MESSAGEBOX("You need to enter a VALID date or time",1,"ERROR MESSAGE")
>>> RETURN .F.
>>> ELSE
>>> RETURN .T.
>>>ENDIF
>>
>>It's not related to the field but to This.Value.
>Does that mean that I need the Character to Date converter as in
>IF !EMPTY(CTOT(This.value) < DATETIME() ???
>I really need to validate this data.
>
>Thanks - Linda

You need 2 tests:

If EMPTY(This.value))
   * Your message here
   return .f.
endif
if This.value > datetime()
   * Your message here
   return .f.
endif
return .t.

Vlad