I am having this problem lately at it is going on my nerves.

I create a route and it is constrained to be orthogonal. When i move it to drawing and try to measure along cetnerlines of the pipes, it ends up that some of the lines are not parallael to each other (offset ranges from 0.00° to 0.03°) even though i do have all of the constraints to make it parallel (and at right angles).

If i want to come back to the sketch and constrain the routes at 90° it pops out the overrconstraint error (as it should) and it clearly shows angle of 90°.

What is going on here ??