Affected Mod Versions:

RTG-1.9.4-2.0.0-alpha.5
Pam's HarvestCraft 1.9.4c
Chisel-MC1.9.4-0.0.6.33

• Forge version: 12.18.0.2010
• RTG version: 1.9.4-2.0.0-alpha.5

Issue Description:

The log goes crazy when trying to create a world. So bad that MultiMC gives up.

MultiMC stopped watching the game log because the log length surpassed 100000 lines.
You may have to fix your mods because the game is still loggging to files and likely wasting harddrive space at an alarming rate!

http://pastebin.com/fLUy0d4a

Same pack, not using RTG as Worldgen, the pack launchs correctly.

1.9.4-2.0.0-alpha.5 is old. This issue is already known and is being worked on.

Thanks.
"Was old" Ii was the newest 1.10.2 I found yesterday when I put the pack together. I just saw there is an Alpha 6 :D