Why the installation of third party package shows error "No such file or directory" ?

Issue

• Facing below error while installing the third party rpm :

[root@rhel6 anyconnect-4.3.05017]# rpm -ivh anyconnect-4.3.05017.rpm
Do you accept the terms in the license agreement? [y/n] y
You have accepted the license agreement.
Please wait while Cisco AnyConnect Secure Mobility Client is being installed...
Removing previous installation...
error reading information on service vpnagentd: No such file or directory
/opt/cisco/vpn/bin/vpn_uninstall.sh: line 178: /etc/rc.d/vpnagentd: No such file or directory
rm: cannot remove `/etc/rc.d/vpnagentd': No such file or directory
Starting Cisco AnyConnect Secure Mobility Client Agent.