Error with Auto Polyline [ATPOLY] - Polylines closing automatically
When using Auto Poly to draw a line between 2 devices, the polyline closes automatically, as shown in the image.
Lock all layers with background/floorplan block references, or move them to locked layers. Auto Poly ignores block references on locked layers. Do not lock layer '0' as this causes issues trimming with Auto Poly.
Block references such as a floorplan or background block references may interfere with the Auto Poly command unless they are on locked layers.