>Fred,
>
>I have already put this code in the BO's Destroy Event:
>
>

>This.oDataLayer = NULL
>

>
>Still, it doesn't work. Is that 'enough'?
>
>I tried to do the following: I intentionally did not put any object reference on the BO.oDataLayer, which obviously resulted in an error. Upon closing the form, and checking on DataSession window, it released properly! So this means that it is the aberration is due to the oDataLayer object reference?
>
>Thanks! And more help please!
>
>Dennis


No, you can't do it in the BO.Destroy because that happens too late. The form already tried to Destroy and couldn't because of the outstanding reference. The order for .Destroy method firing is outer to inner, IE, the Form.Destroy executes first.

You either have to do in the Form.Destroy:
thisform.BO.oDataLayer = .NULL.

Or you can use BINDEVENT in the BO.Init to call some cleanup code in your BO:
*BO.Init:
BINDEVENT(thisform,"Destroy",this,"CleanUp",1)
*BO.CleanUp:
this.oDataLayer = .NULL.

At least that way the form doesn't have to know how to cleanup after other objects.