SAP Message M8088 - Quantity delivered is zero

Diagnosis
The quantity delivered for the item displayed is zero.
INCLUDE MM_IV_MELDUNGEN OBJECT DOKU ID TX

System Response
The system will block the invoice item when the document is posted,depending on how the tolerance key DW is set (quantity variance to GRquantity = zero).

Procedure
Check the quantity entered. If necessary, enter the quantity as zero,if the invoice refers to another item.