problem ucs with il command area

[arya]

good morning to all, I have a problem in my 2015 autocad version in English, but it does it also on a 2013 autocad ita.
in practice with the command area (linen symbol and polygon) when I mix an area the axes turn alone passing from front to back or things so randomly.. turning even the axes aligning them to the side (if example the side is oblique). . I think it's an automatic setting, how do I stop him from turning? Thank you.

 

[dieva]

This is because:
- the setting of dynamic ucs is on,
- the ucsicon variable is = to 3 (the ucs icon is moved to the origin of the axle system)
- the object of which you are calculating the area is a 3d object (extruded perhaps).

when you are about to click the first point it can happen that the cursor detects a higher or lateral face of the object and in this case it aligns to the faces by displaying the icon in new positions.