[development-axapta] Query For modified event of combo

Hi All, can anyone explain me why in case of combobox modified event is called twice firstly on modifying the control and secondly on closing that form which consist that control. I have a requirement in which I have to print a message on modification of the combo control but the message

[development-axapta] Item Arrival Journal

Hi All, I am a new user in axapta and want to receive the material through pallet transport. Firstly I created a purchase order and then created a new item arrival journal. In item arrival journal there are three checkboxes: Pallet Transport,picking location and buffer location. If they are