XF7, Negative Response Code

Sorry, the Title should be X7F, Negative Response Code. I have two Hemi LX vehicles with the same type Mercedes NAG1 transmission in them and am trying to load the complete transmission file from one into the other one and keep receiving this code. Does anyone know what the following code means and how to correct it? The code is, "X7F, Negative Response Code". Both vehicles and all files are licensed. Is there some secret to loading a file from one vehicle to another when everything is properly licensed?