CRS-6706: Oracle Clusterware Release patch level ('') does not match Software patch level (''). Oracle Clusterware cannot be started.

If you noticed CRS-6706 error while starting cluster after patching as below. The error is due to the rootcrs.sh -prepatch not run successfully before patching. The user ran rootcrs.sh -unlock and apply the patch manually. Please follow the steps below to resolve it.

An error was noticed during cluster start.

crsctl start crs

Execute the command below as user root. The command below will sync the patch locally.

cd $GI_HOME/bin

./clscfg -localpatch

Run the command below as user root to lock the crs

cd $GI_HOME/crs/install

./rootcrs.sh -lock

Start Oracle cluster with the command below.

cd $GI_HOME/bin

./crsctl start crs

Check crs with the command below.

cd $GI_HOME/bin

./crsctl stat res -t

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