Solution : https://service.sap.com/sap/support/notes/629814 (SAP Service marketplace login required)
Key words :
enter primary costs, attached program correction, 6c sap notes 459477, sap note 75032, program error, manual planning, overview screen, return button, system sets, measure back
Related Notes :
| 75032 | KP06: quantity/usage not ready for input |