Why is the message "Error: no nodes found in corosync.conf" in the output of "pcs cluster status" command ?

Issue

• Why the error message "Error: no nodes found in corosync.conf" seen in the output of command "pcs cluster status" in RHEL6.5 cluster with pacemaker addon ?

[root@node1 ~]# pcs cluster status
Cluster Status:
 Last updated: Tue Jan  7 18:49:10 2014
 Last change: Tue Jan  7 18:32:06 2014 via crmd on node1.xxx.yyy.com
 Stack: cman
 Current DC: node1.xxx.yyy.com - partition with quorum
 Version: 1.1.10-14.el6_5.1-368c726
 2 Nodes configured
 0 Resources configured

PCSD Status:
Error: no nodes found in corosync.conf          <--------------
[root@node1 ~]# 

Similar error message is not seen in the output of command "pcs status"

[root@node1 ~]# pcs status
Cluster name: pcscluster
WARNING: no stonith devices and stonith-enabled is not false
Last updated: Tue Jan  7 18:49:06 2014
Last change: Tue Jan  7 18:32:06 2014 via crmd on node1.xxx.yyy.com
Stack: cman
Current DC: node1.xxx.yyy.com - partition with quorum
Version: 1.1.10-14.el6_5.1-368c726
2 Nodes configured
0 Resources configured


Online: [ node2.xxx.yyy.com node1.xxx.yyy.com ]

Full list of resources: