Pastebin not allowed? Okay then.
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: adding a window to a container
at java.awt.Container.checkNotAWindow(Unknown Source)...
Type: Posts; User: !Marcus
Re: Getting an error when opening a new Window through a JMenuItem
Pastebin not allowed? Okay then.
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: adding a window to a container
at java.awt.Container.checkNotAWindow(Unknown Source)...
Getting an error when opening a new Window through a JMenuItem
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: addin - Pastebin.com is the error I am getting(It's a link, I see that this forums likes to replace the link with the title...