FTB freezing after a few minutes

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xWizz

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Jul 29, 2019
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Hey,

So I recently updated the monster pack to 1.0.4 in order to play on my preferred server. Before, I was getting almost no lagg at all but now, things are a bit more laggy (but I'ts playable). The thing is, after a certain amount of time playing (5-10 minutes) my FTB freezes and '(not responding)' shows up. It doesn't matter how long I wait, It won't respond again. I have to force FTB to close (sometimes through task manager) and then I can start it up again, only to being able to play for 10 minutes at the most. I never had this before.
Also, I can't show any crash logs because it doesn't actually crash. My console will only say this a few minutes after my FTB froze: [INFO] [Minecraft-Client] Stopping!

I would really appreciate it if someone could help me. I doubt that my computer is too weak for FTB monster because I ran it before with no problems, with several other programs running.
 
Mhm, I've changed my console from minimal to extended and now, when FTB freezes, this shows up in my console:
2014-01-16 17:41:24 [INFO] [STDERR] java.lang.NoClassDefFoundError: net/minecraft/world/CallableLvl2
2014-01-16 17:41:24 [INFO] [STDERR] at net.minecraft.world.World.func_72914_a(World.java:4420)
2014-01-16 17:41:24 [INFO] [STDERR] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:662)
2014-01-16 17:41:24 [INFO] [STDERR] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
2014-01-16 17:41:24 [INFO] [STDERR] at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:129)
2014-01-16 17:41:24 [INFO] [STDERR] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
2014-01-16 17:41:24 [INFO] [STDERR] at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
2014-01-16 17:41:24 [INFO] [STDERR] Caused by: java.lang.ClassNotFoundException: net.minecraft.world.CallableLvl2
2014-01-16 17:41:24 [INFO] [STDERR] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
2014-01-16 17:41:24 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-01-16 17:41:24 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-01-16 17:41:24 [INFO] [STDERR] ... 6 more
2014-01-16 17:41:24 [INFO] [STDERR] Caused by: java.lang.OutOfMemoryError: PermGen space
2014-01-16 17:41:24 [SEVERE] [Minecraft-Server] Encountered an unexpected exception NoClassDefFoundError
java.lang.NoClassDefFoundError: net/minecraft/world/CallableLvl2
at net.minecraft.world.World.func_72914_a(World.java:4420)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:662)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:129)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
Caused by: java.lang.ClassNotFoundException: net.minecraft.world.CallableLvl2
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more
Caused by: java.lang.OutOfMemoryError: PermGen space
I can't really understand it though.
FYI I have force updated my pack once but that didn't solve it.
 
Caused by: java.lang.OutOfMemoryError: PermGen space

update the launcher and java (latest version came out today, java 7 update 51)
 
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