pop up errors

Even though i get the error I can still make the parts do what im trying to do but the error keeps getting in the way of where I am trying to click

I have been trying to generate some new parts from imported parts that were originally produced by Blender. These parts were very inaccurate in flatness and alignment and dimension. I was using points from these intending to extrude new, straight, flat aligned and accurate parts . Three weeks now and I have had continual…