SAP Message 29344 - No all selected items were deleted

Diagnosis
You selected one or more items and chose the Delete itemfunction.
You see this message in one of the following situations:
You are processing a configurable BOM and want to delete an item withobject dependencies. The change number you selected does not supportchanges to the object type "dependency maintenance".
You have selected at least one item that is not valid on thevalid-from date on the initial screen.
You chose the New items -> function first and arenow on the entry screen. To help you see where you are, the systemshows you the item with the highest item number in the first line. Youhave selected this item and chosen the Delete item function.
The BOM has been created or changed in a CAD system and can thereforeonly be processed in the CAD system (see CAD indicator
).

Procedure
1.)
You can only delete an item with object dependencies using a changenumber if the "Object type active for change number" indicator isselected for dependency maintenance.
2.)
You can only delete items that are valid on the valid-from datedetermined by the system.
If you want to delete an item that is not valid, enter a differentvalid-from date or change number on the initial screen.
3.)
This screen is only for entering new items.
If you want to delete items, first choose menu option Goto -> Itemoverview -> .
Select the item again and choose the delete function again.
4.)
Delete the item in your CAD system, and transfer it again via the CADinterface into the SAP System.