Delivery has not yet been put away / picked (completely)

Hello SDNers,

I have a Batch program that is calling VL02n for Delievry Picking ,Pcking & PGI....

This batch program runs in Background

For Some Delivery it is giving this Error Message "Delivery has not yet been put away / picked (completely)"

...But When i run the same program in foreground delivery got Processed Well.

CAN U PLS HELP ME

>Why this Happening

>In what scenarion we genearally get this message(we dnt have TO Confirm Step in our Process)

>even i Analyze the Program of VL02n ...This message is not there

From Where this message is comming

Thx in advance

PLS RPLY ASAP