how to disable the automatic calibration of the MPU 6050 ?

I have tried to disable the automatic calibration of the IMU by calling inv_set_motion_interrupt(0);
and
inv_set_bias_update(0); in the umpl_setup.

But inv_set_bias_update returns "umpl/lite/mlBiasNoMotion.c|inv_disable_bias_no_motion|403 returning 22"
So this error is generated by inv_unregister_fifo_rate_process(MLPollMotionStatus);

Do i have to do something different or is there another way to disable the automatic calibration of the 6050 ?