When auto tuning my MS (ISQ Single Quadrupole MS) I usually get the three error messages below (at various times):

1/ Mass Tune: Mass error exceeds limit.

2/ Lens Tune: Not enough data points for mass 69 at scan rate 200 (during lens tuning) to determine curve fit.

3/ Detector sensitivity: Estimated gain is higher than 5E +06.

Can you suggest reasons why this may occur?