Hi
 
I'm use the command line for "Odo Upgrade Service" on mu local PC.
I try to migrate an odoo V10EE to V16EE for a customer database.
I use this command : python https://upgrade.odoo.com/upgrade) test -d my_database_customer -t 16
The program say : 

"Error: Unable to get the subscription code of your database. Your database must be registered to be eligible for an upgrade. See ..."

Have you an idea ?

Thanks