I have a JAVA file that defines a custom JPanel that configures a tree structure. Some time ago I created it and added it to the palette just find. I then was able to drag that panel onto a JFrame I have created and everything worked perfectly. However, just recently something broke. Im not really sure what but now when I got to switch to Design view I get an error that the component cannont be loaded. Again, I did not change anything! I am wondering what happened. Any suggestions?