Solution : https://service.sap.com/sap/support/notes/41493 (SAP Service marketplace login required)
Key words : 
planned independent requirements management md61, prerequisites program error solution correction, material master mm01, period split 'day', additional key words, interactive forecast, programs saplprom, deactivated
Related Notes : 
       
| 74791 | 3.1H: Forecast date for fiscal year variant MM01 |