22:19:36 : net/minecraft/world/CallableLvl2 The problem is I have to use MultIMC because I want to add another dozen or so mods that aren't in the DW20 pack but I use them. So what gives? I know the pack works because it loads just fine in the FTB launcher. If I am at the threshold of the max amount of mods, just adding one makes it break. At first I thought it was an incompatibility between mods or something, but I can remove any mod from my pack and it works. I've tried increasing the RAM allocated in MultiMC but it doesn't have an effect at all. Then suddenly it refuses to load up a world.

I get pretty close to adding all the mods. To be clear: I am beginning by just trying to recreate a pack on MultiMC that is identical to the DW20 pack. I have been adding mods one at a time to my custom pack and what inevitably happens is when I get enough mods installed, minecraft shuts down when trying to load a new world. I'm trying to use the Direwolf20 1.5 beta pack as a base. Ok I'm trying to set up my own custom modpack, using MultiMC since the FTB launcher does not let me do this for some reason.

Minecraft single player mod packs