By setting the java property DEBUG to true
you get detailed log messages about
- dynamic variables
- unpacking (or skipping) of files
The property STACKTRACE
does provide the stacktrace of an exception and their causes instead of a simple "something has gone wrong" messages.
(Some failure situations like "no space left on the target device" should be handled better in future)
The property TRACE
does add a debug-frame on the right side of the installer window, where you can watch conditions and variables. Variables can also be changed.
When the installer description contains a modifier showDebugWindow=true
the debug-frame is shown in a separate window.