If there occur Ant build failures in AntActionInstallerListener they are handled poorly at the moment. In each case, the installation fails with a messagebox containing the complete error trace not very useful for people just using an installer.
The error handling should be enhanced to the following possibilities:
Hide the Ant stacktrace from the user or open it optionally
Ant build stacktraces can be still seen in the AntAction log file.
info, warning and error level