VISAT sometimes hangs on startup. The splashscreen shows no progress anymore, and the VISAT main frame is never shown. The hanging process can only be terminated via TeskManager (Windows) or kill command (Unix).

The problem seems to be located in the class com.bc.ceres.swing.progress.ProgressMonitorSwingWorker. This class has a method
executeWithBlocking() which uses an invisible (= zero size), modal window in order to realize a certain behaviour: wait until concurrent process has finished without block the EDT (GUI = the responsive progess monitor dialog).