crash-2016-04-11_10.59.59-client.txt

Provide your modlist.

oh yeah sorry:
modlist-serverside (i deleted a few mods which aren't required client-side too just for testing : defuzz-1.2.0, FastLeafDecay-1.8-1.6, journeymap-1.8.8-5.1.3-fairplay [i deleted this client-side too])
FTBLib-1.8.9-2.0.2
FTBUtilities-1.8.9-2.0.2
HardcoreDarkness-MC1.8.8-1.8
inventorypets-1.8.9-1.3.91
Iron-Chests-Mod-1.8.9
LunatriusCore-1.8.9-1.1.2.32-universal
mcjtylib-1.8.9-1.8.1beta10
MmmMmmMmmMmm-1.9b
MoreFurnaces-1.5.0-MC1.8.9
Morpheus-1.8.9-2.0.57
MountedPearl-1.8.9-1.0.0
netherportalfix-mc1.8.9-2.1.6
Pixelmon-1.8.9-4.2.3-universal
RandomThings-MC1.8.9-3.6.6
redstonepaste-mc1.8.8-1.7.2
rftools-1.8.9-4.23beta37
Schematica-1.8.9-1.7.7.142-universal
SciAPI-1.2.0.1
SGCraft-1.10.1-mc1.8.9
SimpleDimensions-1.3
Stellar Sky-0.2.2.4
Thaumcraft-1.8.9-5.2.4

client-side is the same except additions of : 1.8.9-chunkedgeindicator-1.0, InventoryTweaks-1.60-dev-27 and jei_1.8.9-2.28.7.174/JEIAddons_1.8.9-0.12.0.57 and the removal of netherportalfix-mc1.8.9-2.1.6... i shall try with netherportalfix also removed from server...

related to dimensions:
mapping mods: ftbLib/ftbUtilities (having a mapping gui), journeymap.
SGCraft: to traverse between dims
Stellar Sky and SimpleDimensions as previously listed.
maybe mcjtylib has something in it too as this is required for "RFTools Dimensions" (though i'm not using that)

i should probably have added that this crash happens to the client and only when connected to the server.

So you mean joining on dedicated server?

ermm, i thinks so, not really up with all the terminology(a server set up for multiplayer)... i can invite you to join/test too if that helps?

Okay, sorry for that; It was indeed related with the SimpleDimensions mod.

Problem with SimpleDimensions mod, it should not access MinecraftServer to get world name.
There could be temporal fix, but I'll leave this unfixed since it is bug from SimpleDimensions mod.

Would you mind elaborating on that? I only use MinecraftServer to get the map storage of the overworld & the world info of the overworld.

@lumien231 Yes that is the problem. Since there is no World in MinecraftServer on client logged in dedicated server, getting dimension name from client should not use MinecraftServer.