Solution : https://service.sap.com/sap/support/notes/187441 (SAP Service marketplace login required)
Key words : 
additional key words va01, variable message v4294, error message, message category, entered batch, sales order, program error, solution change, independent, prerequisites
Related Notes : 
       
| 187371 | |
| 171646 | Returns with not existing batch - message | 
| 113518 | VA0x: Valuation type for returns with batch is incorrect | 
| 90322 |