Hmmm....


Tunercat is an author / company that makes tuning software.

The CATS tuner is software made by Tunercat.

For flash type engines such as the LT1 the Tunercat solution involves two parts. Winflash connects to your pcm and reads or writes files from and to the vehicle computer. Tuner allows you to make changes to the vehicle file. Tunercat requires definition files which act like a map between all the numbers stored in the calibration and what you need to see and know to change the numbers effectively. The Tunercat definition file is in a format that only works with Tunercat software.

Tunerpro does the same job as the CATS tuner. Tunerpro allows you to make changes to a vehicle calibration file. Like Tunercat it uses a definition file to map the values in the calibration to human understandable numbers. Unlike the Tunercat solution it does not include a program that can read or write a calibration from the vehicle computer.

Tunerpro has seen some significant changes over the years and is now at version 5.0. When Tunerpro has changed the definition file formats have sometimes changed as well. Definitions made for version 5 are not compatible with older versions of Tunerpro.

It looks like you have an LT1 definition file for $EE calibrations which is compatible with Tunerpro version 5 only. You can make changes to LT1 calibrations but you will need another tool such as Tunercat's Winflash or Steveo's EEHack to move calibrations between your computer and your vehicle.