rconfig failed to convert single node to 2 node RAC database

rconfig failed to convert single node to 2 node RAC database. Database Version is 11.2.0.4.0

$ rconfig ConvertToRAC_AdminManaged.xml

<?xml version="1.0" ?>

<RConfig version="1.1" >

<ConvertToRAC>

    <Convert>

      <Response>

        <Result code="1" >

          Operation Failed

        </Result>

       <ErrorDetails>

             Oracle home is not a cluster database home. Make sure that oracle binary is linked with RAC option and the Oracle home entry in Oracle inventory is updated with cluster node list.

       </ErrorDetails>

      </Response>

    </Convert>

  </ConvertToRAC></RConfig>

1)  ConvertToRAC_RAC.xml file is

[oracle@oradbrac4 sampleXMLs]$ cat ConvertToRAC_AdminManaged.xml

<?xml version="1.0" encoding="UTF-8"?>

<n:RConfig xmlns:n="http://www.oracle.com/rconfig"

           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

           xsi:schemaLocation="