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Hello, so I recently started having a problem with a few of the chunks in my Tekkit world. I've done a bit of research in an effort to resolve the problem, but have come up against a wall and there is nothing else I have the expertise to resolve myself or find a resolution too. A couple of weeks ago I started having a major lag problem in a handful of my chunks. It's only occuring in this one handful of adjacent chunks. Basically when I enter any of these handful of chunks I get extraordinary lag unto the game being unplayable within this area. I haven't done anything in these specific chunks

I was wanting to use mcedit in one of my technic pack worlds, but how do I open technic pack worlds in Mcedit?