Depending on the version you are upgrading from and to, one or several steps may be needed in order to get the system up and running.
Read the section Post upgrade in the Release Notes for each upgraded version for further information regarding the required steps.
Note!
During the upgrade process, the content of $MZ_HOME/common/lib is purged and replaced with updated jar files. If you added any additional jar files to your previous installation of, you need to add them again after the upgrade is complete.