No idea what happened, I was mining, very far from the rope, and mid-breaking a block I crashed. The crash report mentions the ninja rope so...yeah.

http://pastebin.com/rwe5yA0U

It's already fixed :p

Even better ^.^

Oh I know what this is, this is caused by a bug persisting over identical code, where I fixed it in most of my mods but forgot to fix it in another.
This should be fixed with the port to InfinityLib, which comes out as soon as the NinjaGear port to InfinityLib is stable enough to my liking.

Thanks for reporting anyways.

Okie dokie, glad it's a known thing with a hopefully easy fix. ^.^