unable to run rconfig

Rconfig erroring out
<RConfig version="1.1" >
<ConvertToRAC>
    <Convert>
      <Response>
        <Result code="1" >
          Operation Failed
        </Result>
       <ErrorDetails>
             The cluster is not configured or is not running on node: qrerpprdb01
       </ErrorDetails>
      </Response>
    </Convert>
  </ConvertToRAC></RConfig>


we are trying to convert single instance to RAC

RAC --11.2.0.3 GRID hone  and  converting  11.2.0.2  database to RAC


[oradb@qrerpprdb01 ~]$ crsctl check cluster -all
**************************************************************
qrerpprdb01:
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
**************************************************************
qrerpprdb02:
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
**************************************************************
[oradb@qrerpprdb01 ~]$ crsctl check crs
CRS-4638: Oracle High Availability Services is online