Perform the following tasks before you install any Sybase software into a directory in which Sybase software is already installed.
Create a backup of the existing installation directory and the environment variable settings.
When you install Sybase products into a directory that contains other Sybase products, the installation program overwrites existing files with the same name. However, if the files on the system are newer than those being installed, the installation procedure prompts you to specify whether or not to overwrite the existing files. In most instances, you want the newer version of the system files and should choose not to overwrite them.�
