Something went wrong with an Applied Energistics block somewhere..
Block location: World: (702,65,-559), Chunk: (at 14,4,1 in 43,-35; contains blocks 688,0,-560 to 703,255,-545), Region: (1,-2; contains chunks 32,-64 to 63,-33, blocks 512,0,-1024 to 1023,255,-513)
Actual block...