INS 35354 the system on which you are attempting to install oracle rac is not part of a valid cluster

Error: the system on which you are attempting to install oracle rac is not part of a valid cluster

[root@node1 ~]# cat /etc/oraInst.loc
inventory_loc=/u01/app/oraInventory
inst_group=oinstall
[root@node1 ~]# cd /u01/app/oraInventory/
[root@node1 oraInventory]# find . -name 'inventory.xml'
./ContentsXML/inventory.xml
[root@node1 oraInventory]# cd ./ContentsXML/
[root@node1 ContentsXML]# cat inventory.xml|grep CRS
[grid@node1 ~]$ cd $ORACLE_HOME
[grid@node1 grid]$ pwd
/u01/11.2.0/grid
[grid@node1 grid]$ cd /u01/app/oraInventory/ContentsXML/
[grid@node1 ContentsXML]$
[grid@node1 ContentsXML]$ cat inventory.xml

You will find entry crs=true is not there in this file

[grid@node1 ContentsXML]$ $ORACLE_HOME/oui/bin/runInstaller -updateNodeList ORACLE_HOME="/u01/11.2.0/grid" CRS=true
Starting Oracle Universal Installer...
Checking swap space: must be greater than 500 MB.   Actual 511 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /u01/app/oraInventory
'UpdateNodeList' was successful.
[grid@node1 ContentsXML]$ cat inventory.xml

CRS="true"

This entry now exists  
    
Repeat activity on all nodes in cluster