Solution : https://service.sap.com/sap/support/notes/425730 (SAP Service marketplace login required)
Key words :
pre-defined time interval, i_eine-prdat < is_niwe0-invon, i_eine-prdat > is_niwe0-inbis, user exits exit_saplniwe_004, user exit exit_saplniwe_004, i_eine-prdat < i_date1, i_eine-prdat > i_date2, system selects prices, user exit exit_saplniw0_001, i_eine-prdat <> '99991231'
Related Notes :
364743 | MRN0 use of the user exit for info record prices |
179615 | Enhancements (user exits) for balance sheet valuation |
157824 | MRN0 Valid info record is not selected |