I am getting an error during crowbar installation from web or shell (/opt/dell/bin/install-chef-suse.sh –crowbar)

SELS12 SP2 DVD media has been copied to directory “srv/tftpboot/suse-12.2/x86_64/install” but still I am seeing this error.

Error
=== 2017-08-02 13:37:21 -0700: Error: SLES12-SP2 has not been set up at /srv/tftpboot/suse-12.2/x86_64/install



/srv/tftpboot/suse-12.2/x86_64/install/:
total 3264512
drwxr-xr-x 1 root root 54 Aug 2 13:34 .
drwxr-xr-x 1 root root 24 Apr 21 00:32 ..
-rw-r--r-- 1 root root 3342860288 Jul 24 13:47 SLES-12-SP2-x86_64-DVD1.iso

/srv/tftpboot/suse-12.2/x86_64/repos/:
total 0
drwxr-xr-x 1 root root 16 Aug 1 16:11 .
drwxr-xr-x 1 root root 24 Apr 21 00:32 ..
drwxr-xr-x 1 root root 82 Jul 31 15:49 Cloud
drwxr-xr-x 1 root root 22 Aug 1 16:11 PTF

/srv/tftpboot/suse-12.2/x86_64/repos/Cloud/:
total 1421004
drwxr-xr-x 1 root root 82 Jul 31 15:49 .
drwxr-xr-x 1 root root 16 Aug 1 16:11 ..
-rw-r--r-- 1 root root 1455108096 Jul 24 13:57 SUSE-OPENSTACK-CLOUD-7-x86_64-GM-DVD1.iso
<media_url><%= @repos[name][:url] %></media_url>

=== 2017-08-02 13:37:21 -0700: Error: SLES12-SP2 has not been set up at /srv/tftpboot/suse-12.2/x86_64/install

Please check the steps in the installation guide.

Crowbar installation terminated prematurely. Please examine the above
output or /var/log/crowbar/install.log for clues as to what went wrong.
You should also check the Installation Manual, in
particular the Troubleshooting section. Note that this script can
safely be re-run multiple times if required.


Thanks,
Ravi