SLES 15 image creation failing with timeout with oz-0-16 and reporting custom iso file not found

[vamsiINFJ]

Installation of SLES-15 SP1 dvd is failing as below when we tried 13.2 OpenSUSE or 42.2 openSUSE as os.

Cleaning up after install
Traceback (most recent call last):
  File "/usr/bin/oz-install", line 162, in <module>
    libvirt_xml = guest.install(timeout, force_download)
  File "/usr/lib/python2.7/site-packages/oz/OpenSUSE.py", line 126, in install
    return self._do_install(timeout, force, self.reboots, None, None, None, extrainstalldevs)
  File "/usr/lib/python2.7/site-packages/oz/Guest.py", line 1576, in _do_install
    self._wait_for_install_finish(xml, timeout)
  File "/usr/lib/python2.7/site-packages/oz/Guest.py", line 827, in _wait_for_install_finish
    raise oz.OzException.OzException("Timed out waiting for install to finish.  %s" % (screenshot_text))
oz.OzException.OzException: Timed out waiting for install to finish.  Check screenshot at /var/lib/oz/screenshots/

The screenshot shows that it's failing at loading of kernel itself.

Does oz support OpenSUSE15? or we have any other mechanism in sles15 similar to oz?
Can you suggest how we can get past this or give an idea of why this might be happening.