I load a state file and then set my start and stop frequencies, and then use calibration wizard and calibrate and save the calibration. I then return to the state and apply the calibration I have just preformed. When I then check to see if "correction" is checked off, as if it is being applied it is not. I then hit apply correction and I get an error stating that calibration needs to be done before correction can be applied. The error is 515. Can someone please elaborate on what I need to do or set up to fix this? Thanks.