Trouble reading PCM tuned earlier with HPT?

[Mr. P.]

Hi all -

This weekend tried to read the calibration off a '06 TBSS and got the 'PCM is locked' dialog window; we called the person who last tuned the vehicle and was told that no he did not lock the tune, and HPT was the last software used to make calibration changes. However the EFILive scanner would work just fine, we were able to log data, I just couldn't read the PCM calibration.

So my question then - are there different/incompatible communication protocols at play here? If so is there a workaround?

Mr. P.

[Doc]

Ask the other tuner if they used a HP Custom OS. Sounds like he might of. Either brand can't read each other's Custom OS's and will give you the "locked pcm" when you try to read.