Compass Error, Exit P-GPS Mode

Hi,
I just bought my second drone DJI phantom 3 professional. Purchase date 03-10-2016. All firware its update.
I can not calibrate the compass. I receive all the time the message ... Compass Error, Exit P-GPS Mode ...
In P mode GPS is green but the drone is very unstable and moves in a circle of 1 meter in circumference and drif.
I received the same message when I lost my first  DJI phantom 3 professionnal.
I want to know if there is a defect.

Hi claudecyr, have you tried to do the IMU calibration on a completely flat surface?
Also, please try to go to another open field with little interference around and do the compass calibration again.
If the error persists, please keep us posted.

I read several post about this problem. And yes I have recalibrated the IMU on a flat surface. And yes, I requalibreted in open space. I still get the same message. ... Errors compass ...
Yet I rode in the same space with my old phantom Professional 3 and I've never had this problem.

Look this video please: