Hi Shijo,
Apart from this, there are few more places you need to check and decide the course of action.
Check the configuration for the Delivery item category and study the purpose of following check boxes for your delivery item category:
- StLocation required
- Determine SLoc
- Dont chk st. Sloc
You can also opt for defaulting the storage location in your delivery document. Configure the same in customizing SPRO: Logistics Execution -> Shipping -> Picking -> Determine Picking Location -> Assign Picking Locations
I hope this will help you to achieve what you wanted.
Regards,
Amit