Some objects can be scaled by XYZ individually by the engine. Rope segments are one example, they only scale by Z and this command returns average of all dimensions giving no real picture of the scale. You can get real scale of each dimension with:
[vectorMagnitude vectorSideVisual _seg, vectorMagnitude vectorDirVisual _seg, vectorMagnitude vectorUpVisual _seg]
for rope segment it will be something like [1,1,1.54066]