@Antoine, I'm using LV2016
@Fab, yes it is a great idea to include this as a customised test in the VI Analyzer. As you've mentioned, the reason why I didn't run the VI analyzer was because it will find any broken VI, which may not relate or affect to my build process.
Regards,
Jimmy
Why arguing? If you have the coordinates you have the analytical solution. You may decompose it in summation of areas of oriented triangles with a common vertex (any point of the plane), or in trapezes based on the y axis, you will get to the same result.