Open the OS 11 Upgrade Tool (default path: click  System and then Upgrade to OS 11).

The OS 11 Upgrade Tool shows the error messages. The most important message is prefixed with Retries; see the example below:

 For more information, review the main migration log under /wfs/migration.log

You can use the system log viewer to review the migration log (see the chapter System Log Viewer in the IGEL OS Manual) or save the log files in order to send them to the IGEL Support Team (see the chapter Save Device Files for Support support).