Currently in IGV when an exception occurs a small red icon in the bottom right corner appears. The user often does not see this and if he sees it, usually not immediately when the error occurs.

1) This make it less likely that users reports a bug
2) Makes it harder for the user to reproduce the bug because he didn’t immediately noticed the crash.

Change the exception reporting level in IGV to show a dialog with the stack-trace. The user can still close it and continue the work.