According to embodiments of the present invention, there is provided a method and system for operating an injection molding machine. For example, a molding system (100) to manufacture a molded article (103) in a mold-cavity system (200) by using a molding material (101) is provided. The system (100) including pressure-control system (126) coupled with the system (200); and controller (160) operatively coupling to system (126), controller (160) having controller-usable memory (162) tangibly embodying set of controller-executable instructions (500) to direct controller (160), including mold-unpack instructions (520), including instructing controller (160) to control system (126) to reduce, after solidification, at least in part, of material (101) being located in a nub region (214) of system (200), internal pressure of material (101) received in system (200) while system (200) remains isolated from stream of flowable-molding material, beyond any reduction of internal pressure in material (101) resulting from cooling of material (101), so that reduction in internal pressure of material (101) is enough to permit safe opening of system (200) while permitting safe extraction of article (103).