Presumably, somewhere in your GUI you have a line of code that sets the figure name and that line of code has a bug. It looks like it adds to the name instead of replacing it.e.g instead of
hfig.Name = "FigBrowser";
you have
hfig.Name = hfig.Name + "FigBrowser";
In any case, if you want us to pinpoint the problem, you'd have to supply your GUI code (and the corresponding figure).
