Failure to comply with any of the following critical points can result in a non-functional iPrint Appliance.
Print pending jobs: Ensure to print or cancel any pending jobs.
Remove all snapshots prior to upgrading an appliance: To ensure that correct disk file and the latest configuration settings get migrated.
Meet all hardware and software requirements: See Section 3.0, Planning Your Print Environment.
Apply all the patches available on iPrint Appliance 4.x. For information on updating, see Section 10.10, Online Update.
Take a backup after applying the patches. For more information on taking a backup, see the Backing Up the Appliance. This creates a iprintconfig.zip that will be used during migration.