Solution : https://service.sap.com/sap/support/notes/654448 (SAP Service marketplace login required)
Key words : 
materials tab page, primary yield incorrectly, primary yield, recipe workbench, propor dimension, system calculates, terms lors, program error, correction manually, correction instructions
Related Notes : 
       
| 631420 | RMGMT210: Corrections in Support Package 04 |