Board Thread:LotR Mod Technical Support/@comment-27646339-20160607191717/@comment-26172435-20160825175615

Make sure you use java 8. Earlier versions don't support 2G afaik.

Check teh java version your client uses in this folder:

C:\Users\YOURLOCALUSERNAME\AppData\Roaming\.minecraft\runtime\jre-x64

The subfolder holding the java version my client uses is called '.minecraft\runtime\jre-x64\1.8.0_25', so I'm using java version '1.8.0_25'.