I am constantly getting these. It appears that, whilesketching a line, if you move the cursor a certain distance whilethe mouse button is down, line goes into "single segment" mode andline terminates when button is released. So if the mouse is movingfast while picking lines the distance moved between "button down"and "button up" is far enough to invoke single segment... and whatyou think is an endpoint pick turns out to be a small segment.

Is that right? Is there some setting controlling this? Do you allconscientiously pause at each endpoint?
SolidworksSketching