I have a question. I have the June 2 2012 software update and an Autocal. I ask my tuner for an TCM tune and copied my TCM OS and sent it to him. It has a .ctz extension. My tuner sent me a cal file to upload and it is giving me a "$0536 Tune file not registered to this autocal device". He can't get my file to open but sent me a tune from the same V2 and same OS as mine but still same error. The file he sends is a .ctd extension. Is this a software version difference problem or something else. The .ctd file will not load into the autocal but it will try to load using the efi tune software pass thru with my laptop. I have talked to Dustin and he isn't sure what is wrong so I thought I'd ask here to see if ya'll may have some ideas.