Are you using the latest version of GFXtract? It works perfectly for me, plus I have no idea why that error would come up. If it still happens can you take a screenshot of the window when the error occurs?
Also I was hoping for some source code on that program, but unfortunately I can't find any anywhere. It's such a strange format so I'm not sure how to extract it myself.
Also I was hoping for some source code on that program, but unfortunately I can't find any anywhere. It's such a strange format so I'm not sure how to extract it myself.