So, I'm trying to set up my Bukkit server and I come to an Error. I have a picture to show what happens when I open the run.bat I'm using Windows XP. Thanks for your help Ch4sey
Under windows folder settings, disable 'hide known extensions'. You can google how to do that. Currently, where you see 'craftbukkit.jar' the file is actually named 'craftbukkit.jar.jar' because windows thinks it's being helpful when it hides the extension. Rename it to just 'craftbukkit' in this case, and it should still say it's an executable jar file. Then run the run.bat file again.
Now it has this, I changed the file to 'craftbukkit' and it doesn't have the Erorr but it doesn't seem it's working. Edit: I also disabled the 'hide known extensions'