I have an e38 2010 Camaro computer. I read that tune and wrote it to a 2012 e38 computer. I had to buy a license for the 2010 Camaro file and then one for the 2012 computer. Removed vats and wrote the 2010 file on the 2012 computer. All is good. Remembered I had to remove the rear o2 and now it states that the 2012 computer is unlicensed even though it just wrote to it. Tried to rewrite the exact same file that I just wrote to it and it wont take that one either.