Unresolved Print stops on first layer

On larger prints, my printer either stops or misprints in the same area every time. The firmware will become unresponsive, even when using "Force Next", usually in the same area and always on the first layer. Sometimes it will get to the trouble area and the x will travel in the negative direction rather than the positive while printing the raft. When it gets to X zero, it will return to the trouble spot and resume printing. The effect is it prints a long stripe to the left of the raft and skips a "bar" in the first layer of the raft. I am using Simplify3D to run the printer. Anyone have any insight?

 

That's definitely bizarre. Try printing over SD and if that doesn't work contact S3D support, they're really good.