---- Minecraft Crash Report ----
// Oops.

Time: 26/04/13 23:42
Description: Ticking tile entity

java.lang.NullPointerException
at mods.railcraft.common.blocks.tracks.TrackLockdownTrain.setCurrentCart(TrackLockdownTrain.java:24)
at mods.railcraft.common.blocks.tracks.TrackLockdown.updateEntity(TrackLockdown.java:18)
at mods.railcraft.common.blocks.tracks.TileTrack.func_70316_g(TileTrack.java:78)
at net.minecraft.world.World.func_72939_s(World.java:2196)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:546)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:651)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:570)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:127)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:468)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)