Board Thread:Bug Reports/@comment-184.6.182.61-20160204143221/@comment-26172435-20160204150309

I see you use Minecraft Forge 10.13.4.1566. This is a very recent version for 1.7.10, not even recommended yet. That is likely to have serious compatibility issues with heavy mods like the LOTR mod. A safe alternative that will most certainly work is Minecraft Forge 10.13.2.1291. I also see this:

JVM Flags: 5 total; -Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M

The only Flag your client launcher really needs is -Xmx2G. Delete the others unless you are certain they add to your client performance.

My advice is to first downgrade your Forge version and if that is not succesful, adjust your JVM Flags.

Good luck!

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