Appropo of nothing, I had a print go 85 layers without fault because it

Appropo of nothing, I had a print go 85 layers without fault because it wasn’t being watched. I looked at it, and it decided to blow up. Seeing as how it’s all CNC and human visible, I googled restarting a print, found this:

http://bootsindustries.com/portfolio-item/salvaging-interrupted-3d-prints-repetier-host/

And am attempting to do so, to reasonably good effect. If you have calipers and can measure the height above the bed surface, and can edit REALLY large text files, you might give it a go!
http://bootsindustries.com/portfolio-item/salvaging-interrupted-3d-prints-repetier-host

Where do you find relative mode in Repetier. I have never seen it.

Phoenix printer I was looking at has a print rewind function for this issue. I don’t know how well it works but the video looks good.

@Wayne_Friedt The article mentions the Gcode, I don’t think it’s a Repetier ‘thing’, I measured the height of the print, (e.g. 21.50mm, searched for ‘z=21.50’, chopped everything off above it, added M83, heated and extruded a little line, then hit print…

You could be right, but it says and shows using Repeiter and checking the box " relative extrusion distance". That check box i have yet to find. Must be on older version.