So, in the past we have been able to load stock tunes with the GM MDI2 hardware then tune with EFI Live. There was never any issue and the ECMs always reacted exactly as a completely bone stock ECM would. Something recently changed and now after an MDI2 flashes an ECM our EFI Live cannot read the tune. This happened on 2 or 3 different e38 ECMs then I thought to try "Try common Alternative Keys" and I am able to read the file. However, on one ECM in particular that was already unlocked, then changed with MDI2, I cannot write a file to it. It's like its no longer unlocked. Again, this didn't use to be the case. I attached a pic of the error message discussing the custom key.

I also cannot license an altogether different e38 that we have tried to work with.

Obviously this could be something that has changed with the MDI2 and GM setup, I am not sure. Has anyone else dealt with this? My buddy at GM says that the MDI2 is being used exactly as they do every day at the dealership. In theory if that's the case a vehicle could come in and need a new ecm under warranty, get replaced, then a year later try to be tuned by EFI Live and have this issue.

Has this already been discussed somewhere and I missed it?

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