Sometimes the Full Load curve for the child and parent engines can start at different idle speeds. If this happens an error message occurs when the curves are uploaded in VECTO Engine. This should not happen as it can be that the child and parent have different idles speeds for example. The actual error message does not make sense either. For the laboratory, the only way to solve this during a witnessed certification is to repeat the Full Load making sure the child and engine start at the exact same speed. If this was the intention it should have been written in the legislation. See attached {width=455 height=100} {width=453 height=252}