With select ECMs & TCMs, outdated versions of software that are on the module can not be supported. In these cases, when attempting to tune your vehicle, you will receive this message:
After you click OK to this message, VCM Editor will automatically load the latest supported and compatible version of your software for you to use. You can then make your changes to this file. Once you're ready to write your ECM or TCM, this new tuned file/software version will overwrite the current version of software loaded on the module. Because it is overwriting the current software, any changes you had previously made to the ECM/TCM (i.e. via other devices) will be overwritten.
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