Problem Description Using sql*plus whenever I do startup it fails with ORA-29760 like below. SQL> startup nomount ORA-29760: instance_number parameter not specified Similarly, whenever I start my database using srvctl it returns same error like following. $ srvctl start database -d didar PRKP-1001 : Error starting instance didar1 on node node1 CRS-0215: Could not start [...]