OK, I got to wondering what the heck you're trying to do so I went and downloaded and installed ganttproject-2.0.10.zip
. It works just fine simply by opening a console window and entering
And, looking over your posts it looks like you may not have Java installed: You should be able to execute
and see where java
resides on your system (if it ain't there it ain't gonna work).
You could look in the log file that's created every time your run the program: ./.ganttproject.log
; might give you a hint or two.
Frankly, there is no reason on this earth to execute that program in background, with sudo
or any other variant of those -- it opens a screen, you can open the example provided with the download (HouseBuildingSample.gan
Hope this helps some.