Translations:Tutorial KinematicSkeleton/39/en

If the Z axes of three elements or joints are parallel and lie on the same virtual plane, the solver may fail to rearrange them in a following step because it is unable to decide in which direction the middle joint should be rotated. This can occur for the Rod 1 element, the Crank - Rod 1 joint, and the Base - Crank joint we have here. If this happens we need to help the solver and rotate one object (e.g. the Crank) manually using the Axial move tool.