CRS-1136 when upgrading Clusterware to 12.1.0.2

Recently I have tried to upgrade the Clusterware from 12.1.0.1 to 12.1.0.2 on a two node Linux cluster. After starting the rootupgrade.sh I got the following error. CRS-1136: Rejecting the rolling upgrade mode change because the cluster is being patched. CRS-4000: Command Start failed, or completed with errors. 2014/08/07 12:48:41 CLSRSC-511: failed to set Oracle…