Solution

1. Visit each node that reported error and run the following command on n-1 nodes:

   $GI_ORACLE_HOME/crs/install/rootcrs.pl -deconfig -force
   

2. If the root script did not run successfully on any of the nodes, pass the -lastNode switch on nth node (conditionally) to the final invocation as shown below.

   $GI_ORACLE_HOME/crs/install/rootcrs.pl -deconfig -force -lastNode
   

Now, retry the failed step from the Procedure Activity page.