[1.7.10] Server console commands does not work anymore?

[raymondbh]

In the server console I often in the past used commands like /help and /list.

/list does not work at all and /help now give me:

 

[13:08:37] [server thread/ERROR]: Couldn't process command: 'help'

java.lang.IllegalArgumentException: Comparison method violates its general contract!

        at java.util.ComparableTimSort.mergeLo(ComparableTimSort.java:740) ~[?:1.8.0_45]

        at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:477) ~[?:1.8.0_45]

        at java.util.ComparableTimSort.mergeCollapse(ComparableTimSort.java:402) ~[?:1.8.0_45]

        at java.util.ComparableTimSort.sort(ComparableTimSort.java:209) ~[?:1.8.0_45]

        at java.util.Arrays.sort(Arrays.java:1312) ~[?:1.8.0_45]

        at java.util.Arrays.sort(Arrays.java:1506) ~[?:1.8.0_45]

        at java.util.ArrayList.sort(ArrayList.java:1454) ~[?:1.8.0_45]

        at java.util.Collections.sort(Collections.java:141) ~[?:1.8.0_45]

        at net.minecraft.command.CommandHelp.func_71534_d(SourceFile:84) ~[au.class:?]

        at net.minecraft.command.CommandHelp.func_71515_b(SourceFile:38) ~[au.class:?]

        at net.minecraft.command.CommandHandler.func_71556_a(CommandHandler.java:94) [z.class:?]

        at net.minecraft.server.dedicated.DedicatedServer.func_71333_ah(DedicatedServer.java:370) [lt.class:?]

        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:335) [lt.class:?]

        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) [MinecraftServer.class:?]

        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]

        at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]

 

Yes I run Java 8 but the same is happening with Java 7.

 

Are this commands removed, or am I mixing this commands from when I ran MCPC+/Caldron?

[LexManos]

No, some mod you have installed has a broken command installed thats breaking all the others.

[61352151511]

http://minecraft.curseforge.com/mc-mods/223797-helpfixer