It doesn't crashed when it's vanilla but crashed with mode...
---- Minecraft Crash Report ----
// Shall we play a game?
Time: 15. 1. 21 오후 7:05
Description: Exception in server tick loop
java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiScreen
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.Loader.identifyMods(Loader.java:324)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:468)
at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87)
at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:319)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:170)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:620)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.gui.GuiScreen
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 9 more
Caused by: java.lang.RuntimeException: Attempted to load class bdw for invalid side SERVER
at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:51)
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
... 11 more
A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_71, Oracle Corporation
Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 949421680 bytes (905 MB) / 1060372480 bytes (1011 MB) up to 4268163072 bytes (4070 MB)
JVM Flags: 8 total; -Xms1024M -Xmx4096M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -XX:MaxNewSize=256M -XX:MaxPermSize=512M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'cauldron,craftbukkit,mcpc,fml,forge'
Type: Dedicated Server (map_server.txt) Type: Dedicated Server (map_server.txt)
