I'd like to use a UDF in this property to convert empty values of some fields into null values.

Thought VFP help says "use ConversionFunc to specify native Visual FoxPro or CUSTOM conversion functions...", it is not working.

When I call TABLEUPDATE(), VFP shows me a "enter view parameter" window. asking for a value for the call of the function... " ChangeNull(mytable.myfield) "

This is my function:

Function ChangeNull(tdData)
If tdData = {}
Return null
Else
Return tdDAta
EndIf
EndFunc


I set the CA property like this:

.ConversionFunc = "date_field ChangeNull"


"set procedure" is ok too...

What's wrong? Shouldn't it work?