Minecraft Forums

Has anyone else had a problem with Aether Mod making the game slow to a crawl? I've tried turning of fancy graphics, short rendering distance, power saving performance- everything I can to make the game run basically at all. Tips?

I installed the Planes mod and got this error:

java.lang.NoClassDefFoundError: BaseModMp
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at ModLoader.addMod(ModLoader.java:267)
at ModLoader.readFromClassPath(ModLoader.java:1227)
at ModLoader.init(ModLoader.java:880)
at ModLoader.AddAllRenderers(ModLoader.java:183)
at th.<init>(th.java:60)
at th.<clinit>(th.java:9)
at net.minecraft.client.Minecraft.a(SourceFile:318)
at net.minecraft.client.Minecraft.run(SourceFile:716)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: BaseModMp
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 21 more
--- END ERROR REPORT 2634ab98 ----------

I'm not running Bukkit, but I am running TMI and CJB Mods.