An apparatus for packaging dosed quantities of medicines and method for operating such apparatus. The apparatus includes multiple dosing stations for dispensing solid drug portions, and multiple collectors for collecting dosed quantities of solid drug portions and for forwarding the dosed quantities of solid drug portions to a packaging station. Each dosing station has an outlet and each collector has a unique collector identifier. A conveyor includes multiple mounting elements arranged in a chain, wherein each collector is detachably mounted to one of the mounting elements and moved by the conveyor along the dosing stations, so that the collector can receive the solid drug portions dispensed at the outlets of the dosing stations. A controller controls the operation of the dosing stations, the conveyor and the packaging station. Input means (80, 81) are coupled to the control means (19) for inputting the collecting means identifier. The controller maintains a mapping between identifiers assigned to each mounting element or mounting position and the unique collector identifiers of the collectors.