Diagnosis
You have tried to carry out a structure explosion within an explodedstructure, but this is not possible.
For example, the system finds one component and one item categorywithin an exploded BOM that leads to another BOM explosion in documentprocessing. This is not possible because you can only explode a multi-level BOM and the explosion can only start with a document item thathas not been generated by the previous explosion.
Similar problems occur when combining BoM explosion and productselection.

System Response
The system does not carry out the lower-level explosion.

Procedure
Configure the settings in Customizing, so that sub-items do not lead toanother explosion. It might be that the wrong item category wasdetermined for the sub-item.