Hello Rex
I have done as you suggested and it just about works :-) The record is added to the file ok, but after clicking the OK button I get an error:

error# 1925
Message: Unknown member OCALLINGFORMLISTOBJ.
LINE 68
CODE; lcSelect = CREATEOBJECT('CSelect',ThidForm.oCallingFormListObj.GetAlias())

method: click
Object: propdetail.cmdok

I used the code similar to that used in the cmdadd.Click from the clistobjedit class in the cmdAdd button on my form:

llRetVal = DoForm('PropDetail',This.Parent.Bizobj)

I think this is where the problem is as it is obviously not stoing the calling forms bizobj. I am confused as the the correct number of arguments to send to the called form and what the information should be?
Allan Godney