Thanks Gianluca,

  I'll give it a go and let you know what (if) works.

On 16 November 2016 at 13:29, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:
On Wed, Nov 16, 2016 at 12:24 PM, Maton, Brett <matonb@ltresources.co.uk> wrote:
Hi,

  I downloaded an OVA image from OpenVAS but I can't import it into ovirt, any suggestions ?

engine-image-uploader -e Export upload /tmp/OpenVAS-8-DEMO-1.0.ova
WARNING: ovirt-image-uploader is deprecated in 4.0 and will be removed in 4.1
Please provide the REST API password for the admin@internal oVirt Engine user (CTRL+D to abort):
ERROR: not a gzip file



Unfortunately, OVA is a generic term describing a container for a VM/group of VMs definitions but it is implemented in different ways.
From OpenVAS website it seems their OVA format is for Virtualbox >= 4.3... correct?

You could try to export the disk file/s with VirtualBox command line tool VBoxManage (never tried myself):

Or eventually follow what described in this thread, that implies to import the OVA into a VirtualBox environment and then re-export it for oVirt with the steps described: 

HIH,
Gianluca