You can have two different versions of the viewers
SDK installed on a single machine (referred to as a side-by-side installation).
The recommended method of achieving a side-by-side installation is to use the
WEB-INF\lib directory
of your web server to house the JAR files required by the viewers SDK. See
JAR files needed for deployment of
SAP BusinessObjects
software for details. When a new version of the
viewers SDK is installed, the new JAR files that are automatically installed do
not overwrite the JAR files in your
WEB-INF\lib directory.
By maintaining the older version of the SDK, your web application can continue
to use the older library until you are ready to migrate to the newer version.
To migrate to the new version, make the appropriate
changes to your web application, and then copy the new JAR files into the
WEB-INF\lib directory.