I remember having his problem at one time and the solution was not obvious. In RealBand open the Chords Window > Click on a Bar and choose Options. This action will open a Dialog Panel with a number of Options. The important option is "Auto Interpret Chords. I choose Never as I have had on occasions suspected that the original Chords to have been overwritten.

I have just experimented with loading a file into BIAB and then loading the same file into RB. The chords were loaded accurately bearing in mind certain differences in expression.

The Chords can be changed in RB and the changes should be recognised on Generation.

I have taken a Screen Shot of the two Chord Windows but have forgotten how to post this in the Forum. Help??????