Add a UDF for the date/time, and put a column post-validate script on the UDF you want to track... to set the date/time UDF.

Would I set the trigger to be if the udf is greater than 0 or can I set if the field is updated?  Thinking out loud, can't do if greater than zero because if we receive an item multiple times, so need to set it on if the udf was updated.  Would the BusObj.EditState =2 be the correct variable to look for this?

The event is the event.  Column post validate will trigger when someone changes the data in that column.

The business logic you apply in the script is up to you, depending on your business requirements.

I set on a column post val of the udf_qty_received, received this error when I tried to update the udf from a receipt of goods script and also when I tried to update the udf directly on the SO.

Here is the script.

rVal = 0	
dToday = ""
nQTY = 0

rVal = BusObj.GetValue("UDF_QTY_RECEIVED", nQTY)

if nQTY > 0 then
	
rVal = oSession.FormatDate(oSession.SystemDate, dToday, "%M/%D/%Y")
	
dToday = oSession.GetFormattedDate(CStr(dToday))	

rVal = oBusObj.SetValue("UDF_QTYREC_UPDATED$", dToday)

end if

I set on a column post val of the udf_qty_received, received this error when I tried to update the udf from a receipt of goods script and also when I tried to update the udf directly on the SO.

Here is the script.

rVal = 0	
dToday = ""
nQTY = 0

rVal = BusObj.GetValue("UDF_QTY_RECEIVED", nQTY)

if nQTY > 0 then
	
rVal = oSession.FormatDate(oSession.SystemDate, dToday, "%M/%D/%Y")
	
dToday = oSession.GetFormattedDate(CStr(dToday))	

rVal = oBusObj.SetValue("UDF_QTYREC_UPDATED$", dToday)

end if

I see the error, seeing crossed eye with this conversion.

Typo, oBusObj vs BusObj.