SAP Message VL188 - Pick order & does not contain any items to be processed

Diagnosis
The pick order does not contain any items to be verified or (dependingon the settings) confirmed.
This may have occurred for one of the following reasons:
The pick order does not exist (perhaps the wrong number was entered)
The pick order does not contain any items that are relevant for picking(text items are not relevant for picking, for example)
All items in the pick order that are relevant for picking have alreadybeen verified and (depending on the settings) confirmed

System Response
Further processing is not allowed.

Procedure
See if one of the above situations is the case, and if so, take theappropriate measures to correct it.

171979Error in pick order verification VL08 / performance