When using the mass import tool, you may be presented with an error saying that some vehicles have failed to import.
One of the most common cause for this is the formatting of the vehicle registration. You must ensure that there are no spaces within the registration.
For example:
As well as ensuring the registration field is set correctly, please ensure that all other fields have the correct formatting.
The best way to do this would be to download the template provided, and create a XLS or CSV file using that.
You can download the template from the mass import tool page, found here.