IGEL Linux v5 IGEL Linux v5 How-Tos Upgrading IGEL UD/IZ Devices from IGEL Linux v5 to IGEL Linux 10 Troubleshooting Current: Error Diagnosis PDF Download PDF Download page Error Diagnosis. Current page All pages Error Diagnosis If the upgrade has failed for one or more devices, there are several methods of error diagnosis: Look at the output of the IGEL Linux 10 Upgrade Tool after the fallback to IGEL Linux v5 has been completed. Go to > System > System Log Viewer and look at the /var/log/messages entries for the current day. If the device has booted into the Linux 5.11 rescue system, you can find debug information in /wfs/igel_v5_to_v10_migration.log ×