A system downgrade is a user controlled downgrade to an older version of

This procedure can be used after a simplified upgrade. 

To revert to a previously installed version, execute the following procedure:

1. Ensure that the environment variables are set correctly:

2. Disable all workflow groups, either from the Execution Manager in Desktop, or by entering an mzsh command, for example:

   $ mzsh mzadmin/<password> wfgropudisable \*

3. Stop all workflows.
    

4. Shut down all connected Desktops.
    

5. If you want to see which Desktops that are connected, you can use the following command:

   $ mzsh mzadmin/<password> pico -view

6. Shut down the Platform and all ECs.

   $ mzsh shutdown Platform <ec name> ...

7. Remove MZ_HOME.

   $ rm -rf $MZ_HOME

8. Restore the backup of MZ_HOME.

   $ cp -r <backup directory> $MZ_HOME

9. If you are downgrading a system using Oracle, restore the database backup.

Resume Workflow Execution

1. Set the environment variables JAVA_HOME and PATH according to the system requirements of the restored version.

2. Start the Platform and all ECs.

   $ mzsh startup Platform <ec names> ...

3. Import the configurations that were exported in the old version prior to the upgrade.      

   $ mzsh mzadmin/<password> systemimport <backup directory>/<filename>

4. Start the real-time workflows.
    

5. Enable the Workflow Groups.