Source:  ZENworks for Servers; Policy and Distribution Services installation on UNIX servers.

Explanation:  A package can only be installed once.

Possible Cause:  A problem occurred during package installation that kept it from installing completely. You need to install the package again so that it can run successfully to completion.

Possible Cause:  You want to reinstall for some other reason.

Action:  Follow the instructions in Removing the Software on UNIX Servers .