In the event of serious, unresolvable problems following the upgrade, the IOA environment can be restored back to the pre-upgrade level of the system, provided that the compatibility mode has not been changed and the backup file was created in Step 1.3, 'Backup your INCONTROL system'. Exit from ICE and use a copy of the MNTJREST job from the INSTWORK library of your IOA environment. Follow the instructions in the job to perform the Fallback.