Diagnosis
You want to change the item(s) on the valid-from date.
You either entered this date directly on the initial screen in thefield Valid from, or the system determined the date from thechange number you entered on the initial screen.
As the selected item(s) is/are not valid on &V1&, you cannot change theitem(s) on this date, and therefore cannot create an allocation to anoperation.
You have to make any changes to an item within the validity period ofthe item, which is defined by the fields Valid from andValid to or the change number on the item overview.

Procedure
If you want to allocate the item(s) to an operation, make the changewithin the validity period of the item(s).
There are two ways of doing this:

• If the BOM has not yet been changed with history (with reference to a
change number), choose the valid-from date of the item(s) as thevalid-from date on the initial screen.

• If the BOM has already been changed with history, make the change with
reference to a change number.
Choose a change number with a valid-from date which lies within thevalidity period of the item(s): the selected item(s) may already havebeen changed or entered with reference to a change number.