I am having trouble with Electrical 3D Routing of a simple 6-pin to 6-pin harness. I have done a line diagram, reserved a cable, associate wires between the pins & added parts to 3D. Both parts have C-points and I have draw a path. I click on the rout cable nothing happens. I click on it again and click on draw graph it wires appear. Click the check mark and they disappear. Any ideas on this?