Solution : https://service.sap.com/sap/support/notes/1455168 (SAP Service marketplace login required)
Key words :
_FIX_CONTROL , v$system_fix_control, Oracle, ORA-940, "invalid ALTER command"
Related Notes :
| 1454675 | _FIX_CONTROL parameters are ignored |
| 1431798 | Oracle 11.2.0: Database Parameter Settings |
| 1289199 | Information about Oracle parameters |
| 1233458 | Error during startup: ORA-00940: invalid ALTER command |
| 1114704 | ORA-940 after alter system "_FIX_CONTROL"='' |