statusbar;

Instead, it is simply made invisible using the root-pane’s setStatusBarVisible(0) method in line #222. Then, when you recreate the statusbar, adding the internal handles to the CornerGrip, TextPanel and ProgressBar fails, since these properties already exist in the old (previously-hidden) statusbar object.

Your solution, to comment line #263, is probably the easiest and best.

I am using statusbar in my codes since I prefer waitbar docked. I wanted to know how to delete this object in a safe way.
In the help, I can read that the command

statusbar;

deletes status bar from current figure. But I had to comment the line 263 :

lasterr

to prevent the message : Property Name already in use . It happens each time I recreate a statusbar or when I display a dialog box.

I guess that :

jProgressBar.setVisible(0);

is not enough to delete this object.

Thanks,
Aurélien