So I just started using modpacks, so I apologize if I'm being stupid about things, but I played with absolutely no problems for several days before it started crashing every time I try to use my smeltery...I included the crash report, really hope someone can help me, I'm really enjoying hexxit...thank you
http://pastebin.com/x3uuDz9X
crash-2016-07-03_16.01.13-client.txt