I was working on a scarf and was nearing the end when the nemesis of every weaver reared its ugly head. A knot in the warp thread! And, of course, the knotted thread was through a hole, not a slot! What to do? I could splice in a new warp thread but that is a lot of work. I kept weaving and when the knot came close to the heddle, I found it would slip through the hole. Phew! I finished weaving the scarf but still had to take care of the knot. That warp thread was looser than the others and I could feel the knot in the fabric. I cut a piece of yarn that I used for the warp that matched the offending thread and using a blunt needle wove it through weft matching the path of the knotted thread. All that remained was to trim the tails of thread and the repair was complete.