Board Thread:Bug Reports/@comment-77.49.33.95-20160605112448/@comment-25330335-20160606014649

Alright, just a little more info here would be nice. Maybe an actual crash report, a description of when the crash happened, an Idea what mods and forge version you were using...

But in all likelyhood this is something that Mevans did better than vanilla MC/Forge, that neither of those programs anticipated, and they don't know how to deal with it. I see MCPatcher in there, try removing that.