Solution : https://service.sap.com/sap/support/notes/517121 (SAP Service marketplace login required)
Key words : 
batch class, reference characteristic, batch status, usage decision, inspection lot, batch master, terms qa11, qa14 reason, prerequisites prerequisite, error occurs
Related Notes : 
       
| 517475 | Incorrect classification of class characteristics in QM | 
| 483543 | QA11: Reference characteristics of batch are not classified | 
| 421975 | CL30N: Search w/ reference characteristics finds no objects |