Hello Bill Ennals,

I don't know if this topic is still alive, but i had some interest too on OpenUpgrade (i have Odoo instances in 6.1 that i wanted to migrate in 8.0, i have not yet started migrations, but OpenUpgrade seems to ber a good candidate).

If you succeeded to migrate your DB in V8.0, i think the next step you have to do is:

- Download (Official) Odoo V8.0 server (if needed, configure your .conf file)
- Start it, try to connect to your migrated DB (through web client), and go to "configurations > modules" to perform update on all your installed modules (OpenUpgrade is a fork of Odoo V8.0, adding some migrations files, but the last official commits will probably be missing)
- if all work without errors, you can start to work with your new fresh instance ^^ (of course, don't forget to dump your DB for backups)

Hope it helps you,

Regards,
PLANCHER Bruno

Edit

Answer written by PLANCHER Bruno, got accidentally deleted when I meant to delete my draft comment, luckily I was able to retrieve his answer & copied the same. Message to Odoo Team, please set validation against deletion of a message, that way user doesn't accidentally/unknowingly delete answers without prior confirmation.

Thanks for your answer deep.  I did eventually figure this out and was able to migrate and restore a database from v7 to v8.  I got  good help from the OpenUpgrade team at Github.  In short, my first attempt to migrate had not worked properly at all so the restored database simply did not work (and it caused problems connecting to the server at all which made me think I was going something wrong when restoring it).  Once I had managed to run the migration script correctly restoring the migrated database was a simple case of restoring through the database manager in a freshly installed instance of Odoo V8.

Here is the link to the threads at Github which helped me sort it out:

https://github.com/OCA/OpenUpgrade/issues/233