Production picking list journal not pick automatically batch & serial numbers

Hi,

I am facing a problem in production order execution.The scenario is I have created automatic picking list journal while starting a production order. The picking list has been created but batch number & serial numbers for the item has been not picked/reserve automatically. Is this some setup problem can anyone please suggest me how to solve this.

Note: i done setups in production → setup → reservation = start

Thanks,

Tarak