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Bad compass health purple cube

A new Cube mini Purple ,states “Bad compass health” on the internal built in compass.
I do not use external compass.
It was working fine for one week.
PreArm: Compass not healthy
PreArm: Throttle below Failsafe
Her are the details :
Frame: QUAD
CubePurple 00240023 32385111 38383435
ChibiOS: ab2f8d8d
ArduCopter V3.6.11 (f0d59294)
EKF2 IMU0 tilt alignment complete

Have you changed anything in the week prior to getting the message?
Updated the firmware?
What GPS are you using?
Does the GPS have a compass in it?
Have you turned that compass off?
Are you using Mission Planner for your setup?

Something has changed in if it was flying OK.
Photos, details, a log, would all help.

Hi Mike
I did try to move to PX4 version, it is not working ( level horizon is upside down)
so I went back to ArduCopter.
Looks as the older version I had was 3.6.10 ( I have the old logs)
Now I can not get back to any working version.
No external GPS/Compass.
I am using mission planner and tried also QGC as well.
I feel like steering water.

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