What Version of NeoTech are you using: v2.4.0a

If possible, did you break and replace the block: Reverted to 2.3.9 and removed all blocks from world, kept in player inventory

Please Pastebin.com the crash Report and put link here: http://pastebin.com/gjLuFCPq

After removal of all blocks I successfully updated to 2.4.0a.