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?