Before you upgrade, ensure that you back up the Rational Test Control Panel workspace. After you upgrade, you cannot roll back your installation to the earlier version.
You can upgrade from V8.5.x to V8.6 without having to uninstall the software. For upgrade instructions, see Upgrading the software.
From version 8.5.1, Rational Test Control Panel includes IBM WebSphere® Application Server Liberty Profile instead of Apache Tomcat as the application server. As a result of this change, the library location for the Microsoft SQL Server and MySQL drivers is changed.
If you use MySQL or SQL Server as the results database, after you upgrade from version 8.5.0.x to version 8.5.1 or later, add the JDBC drivers to the V8.5.1 and later library location.
For information about adding the drivers and the driver locations, see Adding Microsoft(tm) SQL Server and MySQL drivers
If you do not add the drivers after the upgrade, you cannot access the results database stored in SQL Server or MySQL databases.