Netbackup client installation issue - PBX not starting

I am trying to install Netbackup 7.6.1.2 client on a unix server and its failing with the below mentioned error,

Installing PBX...
Please wait while installation is in progress...
Installation completed Successfully
Installation log located here: /var/tmp/installpbx-8416-030216094454.log

ERROR: The pbx_exchange daemon is not currently running. It must
be started before NetBackup installation can be continued.
Aborting ...

client_config_failed

Below is the /var/tmp/installpbx-8416-030216094454.log,

[root@pl-p1-ecnm-app-01 ~]# cat /var/tmp/installpbx-8416-030216094454.log
[03-02-16-09:44:54] Version of installer script installpbx is 1.5.6.4
[03-02-16-09:44:54] Verifying that script is being run by root
[03-02-16-09:44:54] User verified
[03-02-16-09:44:54] Machine details
Linux pl-p1-ecnm-app-01 2.6.32-431.66.1.el6.x86_64 #1 SMP Fri Oct 2 13:15:53 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux
[03-02-16-09:44:54] Installation directory and list of files in it
/root/tmp-bkp/bp-install/openv/netbackup/client/Linux/RedHat2.6.18
total 454904
-r-xr-xr-x. 1 root bin 46034680 Sep 9 11:09 JRE.tar.gz
-r-xr-xr-x. 1 root bin 193725799 Sep 9 11:09 NB-Java.tar.gz
-r-xr-xr-x. 1 root bin 9279225 Sep 9 11:09 PBX.tar.gz
-r-xr-xr-x. 1 root bin 167099181 Sep 9 11:09 client_bin.tar.gz
-r-xr-xr-x. 1 root bin 103873 Sep 9 11:09 client_config
-r-xr-xr-x. 1 root bin 93233 Sep 9 11:09 cp_to_client
-r-xr-xr-x. 1 root bin 25087 Sep 9 11:09 extract_java
lrwxrwxrwx. 1 root root 14 Mar 2 09:44 ftp_to_client -> install_client
-r-xr-xr-x. 1 root bin 31472 Sep 9 11:09 install_client
-r-xr-xr-x. 1 root bin 57885 Sep 9 11:09 installpbx
-r-xr-xr-x. 1 root bin 11777847 Sep 9 11:09 nbcheck
-rw-r--r--. 1 root bin 629 Sep 9 11:09 nbj.conf
-r-xr-xr-x. 1 root bin 37139821 Sep 9 11:09 pddeagent.tar.gz
-r-xr-xr-x. 1 root bin 33701 Sep 9 11:09 pdinstall
lrwxrwxrwx. 1 root root 14 Mar 2 09:44 sftp_to_client -> install_client
lrwxrwxrwx. 1 root root 14 Mar 2 09:44 ssh_to_client -> install_client
-r-xr-xr-x. 1 root bin 383347 Sep 9 11:09 tar
-r--r--r--. 1 root bin 31 Sep 9 11:09 version
[03-02-16-09:44:54] Checking for VRTSpbx
[03-02-16-09:44:54] rpm -qa | grep VRTSpbx
[03-02-16-09:44:54] VRTSpbx is not installed
[03-02-16-09:44:54] Preparing for package installation
[03-02-16-09:44:54] Checking whether required package tar ball is present...
[03-02-16-09:44:54] Required package tar ball PBX.tar.gz is present
[03-02-16-09:44:54] ********************************************************************************
[03-02-16-09:44:54] ***************************Present status of PBX installation*******************
[03-02-16-09:44:54] ********************************************************************************
[03-02-16-09:44:54] /opt/VRTSpbx/build_version is not present
[03-02-16-09:44:54] ********************************************************************************
[03-02-16-09:44:54] ps -ef | grep pbx
root 8416 8415 2 09:44 pts/1 00:00:00 /bin/sh ./installpbx -f PBX.tar.gz
root 8461 8416 0 09:44 pts/1 00:00:00 grep pbx
[03-02-16-09:44:54] ********************************************************************************
[03-02-16-09:44:54] /etc/vx/VxICS/icsul.conf is not present
[03-02-16-09:44:54] ********************************************************************************
[03-02-16-09:44:54] /etc/vx/VxICS/VxPBX.cfg is not present
[03-02-16-09:44:54] ***********************End present status of PBX installation*******************
[03-02-16-09:44:54] ********************************************************************************
[03-02-16-09:44:54] Removing temporary directory
[03-02-16-09:44:54] rm -rf /var/tmp/VRTSpbx_8416
[03-02-16-09:44:54] Creating temporary directory
[03-02-16-09:44:54] mkdir -p /var/tmp/VRTSpbx_8416
[03-02-16-09:44:54] Copying PBX.tar.gz to /var/tmp/VRTSpbx_8416
[03-02-16-09:44:54] Extracting /var/tmp/VRTSpbx_8416/PBX.tar.gz into /var/tmp/VRTSpbx_8416
[03-02-16-09:44:55] Please wait while installation is in progress...
[03-02-16-09:44:55] Installing/Upgrading private branch exchange on Linux
[03-02-16-09:44:55] Checking for the PBX process...
[03-02-16-09:44:55] PBX process is not running.
[03-02-16-09:44:55] rpm -U --nodeps --nopostun --nopreun /var/tmp/VRTSpbx_8416/VRTSpbx-1.5.4.0-0.RH_x86_64.rpm

[03-02-16-09:44:56] Starting pbx_exchange
[03-02-16-09:44:56] ********************************************************************************
[03-02-16-09:44:56] ***************************Present status of PBX installation*******************
[03-02-16-09:44:56] ********************************************************************************
[03-02-16-09:44:56] /opt/VRTSpbx/build_version
Symantec_Private_Branch_Exchange-1.5.4.0
[03-02-16-09:44:56] ********************************************************************************
[03-02-16-09:44:56] ps -ef | grep pbx
root 8416 8415 1 09:44 pts/1 00:00:00 /bin/sh ./installpbx -f PBX.tar.gz
root 8647 8416 0 09:44 pts/1 00:00:00 grep pbx
[03-02-16-09:44:56] ********************************************************************************
[03-02-16-09:44:56] cat /etc/vx/VxICS/icsul.conf | grep 103
103.DebugLevel=1
103.AppMsgLogging=ON
103.LogToOslog=false
103.LogDirectory=/var/log/VRTSpbx/
103.L10nResourceDir=/opt/VRTSpbx/resources
103.L10nLib=/opt/VRTSpbx/lib/libvxexticu.so.3
103.L10nResource=VxPBX
103.MaxLogFileSizeKB=1024
103.RolloverMode=FileSize
103.NumberOfLogFiles=5
103.LogRecycle=true
103.LogFilePermissions=640
[03-02-16-09:44:56] ********************************************************************************
[03-02-16-09:44:56] cat /etc/vx/VxICS/VxPBX.cfg
[VxPBX]
"Insecure"="1"
"AuthUsers"="root"
"InstallPath"="/opt/VRTSpbx/bin"
"PortNumber"="1556"
"DebugLevel"="10"
[03-02-16-09:44:56] ***********************End present status of PBX installation*******************
[03-02-16-09:44:56] ********************************************************************************
[03-02-16-09:44:56] Installation completed Successfully
[03-02-16-09:44:56] Removing temporary directory
[03-02-16-09:44:56] rm -rf /var/tmp/VRTSpbx_8416
[03-02-16-09:44:56] installpbx exiting with return code: 0
[03-02-16-09:44:56] Installation log located here: /var/tmp/installpbx-8416-030216094454.log
[root@pl-p1-ecnm-app-01 ~]#