Solution : https://service.sap.com/sap/support/notes/495063 (SAP Service marketplace login required)
Key words :
transaction se91 create, attached advance correction, investment program position, message classe 'bp', availability control required, availability control, message reason, program error, budget distribution, wbs element
Related Notes :
| 492917 | Availab.ctrl w/budget distribution to WBS elmnt of level > 1 |
| 444439 | No activatn of avail.cntrl for budget distrbtn to WBS elmnts |
| 430451 | Activating avail. ctrl for budget distributn to WBS element |