Diagnosis
When you create a document in Contract Accounts Receivable
you must ensure that the fields repetition item(OPUPW_KK) and sub-item (OPUPW) are empty. OPUPW isfilled when you delete a repetition item; OPUPZ is filled when youpartially clear an item.
INCLUDE NA_SYSADMIN1 OBJECT DOKU ID TX

Procedure for System Administration
INCLUDE FICA_NA_OSS OBJECT DOKU ID TX