>Hi,
> Do you know what is the title of the ultility? I failed to find it!!!
> What is dangling object ref.?
>
>Thank you

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Unfortunately I don't remember the title, just remember there was something like that.
Dangling object reference means, you have a variable holding a reference to an object. You cannot close form or get GPF till object is alive and reference is not nullified. Very rough and simple but this gives idea :

thisform.mycustomvar = thisform.someobject && An object reference...
* thisform.myCustomVar = .NULL. && w/o this line somewhere - ie: in destroy
thisform.release && Would either GPF or form doesn't close (Activex tend to GPF)

Cetin