TikeRike Posted December 20, 2012 Share Posted December 20, 2012 I recently tried to install Forge Universal version 6.4.1 on the 1.4.5 Minecraft server version. But everytime I try to run the server I get this message: Exception in thread "main" java.lang.IncompatibleClassChangeError: Implementing class at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) logout Can someone help me with this problem? I am on a Mac Quote Link to comment Share on other sites More sharing options...
HMPerson1 Posted December 20, 2012 Share Posted December 20, 2012 How did you install it and how are you running it (e.g. startup script)? Quote There's an EAQ for a reason. Read it! "Note that failure to read this will make you look idiotic. You don't want that do you?" -- luacs1998 First rule of bug reports: More information is always better. Oh, and logs OR IT DIDN'T HAPPEN!! Link to comment Share on other sites More sharing options...
LexManos Posted December 20, 2012 Share Posted December 20, 2012 This typically happens when you have something in there that is for the wrong version of minecraft. Remove everything including your mods and coremods folder. And start fresh. Quote I do Forge for free, however the servers to run it arn't free, so anything is appreciated. Consider supporting the team on Patreon Link to comment Share on other sites More sharing options...
TikeRike Posted December 21, 2012 Author Share Posted December 21, 2012 Bleh, I think I know why... Didn't know 1.4.6 got released and I probably downloaded the 1.4.6 version of the minecraft server. Anybody have a spare 1.4.5 Minecraft Server.jar (maybe with Forge pre-installed)? Quote Link to comment Share on other sites More sharing options...
keepcalm Posted December 21, 2012 Share Posted December 21, 2012 Vanilla 1.4.5 server: http://assets.minecraft.net/1_4_5/minecraft_server.jar Quote Protip: try and find answers yourself before asking on the forum. It's pretty likely that there is an answer. Was I helpful? Give me a thank you! http://bit.ly/HZ03zy[/img] Tired of waiting for mods to port to bukkit? use BukkitForge! (now with a working version of WorldEdit!) Link to comment Share on other sites More sharing options...
TikeRike Posted December 21, 2012 Author Share Posted December 21, 2012 Thanks, I'll try ASAP Quote Link to comment Share on other sites More sharing options...
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