Diagnosis
You want to create handling units (HUs). However, the required plant andstorage location data has not been specified or is incomplete.

System Response
If you want to create HUs with a reference to a sales order during thepacking phase in production, the system determines the storage locationfrom the sales order. If no storage location has been specified, thesystem issues this message.

Procedure
To pack in the background, you must specify a storage location in thesales order.