When I tried to use OVFTool 4.3 to import the OVA with an ISO attached that is on an HTTP server, it always failed with message:

Error: File (Ubuntu-file1.iso) could not be found.

This is my command:

ovftool \

     --X:logFile=/tmp/ovftool_503.log --X:logLevel=verbose --datastore="datastore1" \

     --noSSLVerify --acceptAllEulas --name="UbuntuWithCd" --diskMode=thin \

     "http://192.168.1.1:8000/vm/Ubuntu_with_cd.ova" \

     "vi://root:Compaq123@192.168.1.2"

Since the OVA is just a tar file, so I use `tar -tf` to check the file and it shows that the ISO file is ordered before the VMDK:

$ tar -tf Ubuntu_with_cd.ova

Ubuntu.ovf

Ubuntu.mf

Ubuntu-file1.iso

Ubuntu-disk1.vmdk

Also, based on the log, OVFTool seems to shows that it tries to download the VMDK first. So, I untar the original OVA and tar it again, with VMDK before ISO:

$ tar -tf Ubuntu_with_cd_vmdk_before_iso.ova
Ubuntu.ovf
Ubuntu.mf

Ubuntu-disk1.vmdk

Ubuntu-file1.iso

and then the import command succeeded. I think this is a bug?