This is because your calibration does not match the OS you want to install.
I don't know about Opcom.
You can use VXdiag nano with DPS.
What you will need for HMI 2.5 update
1. A used HMI 2.5 module.
2. Single car USB port.
3. DPS 4.46 software
4. DPS HMI VIN change file for silverbox
5. Depending on the HMI module and what's already activated you will need a custom HMI calibration to activate your 2014 Track-pad, and rear camera if you have one.
6. Radio firmware for updating the radio module's firmware to HMI 2.5 specs
i inbox you plz check
I bought the file. VIM and trackpad in my 2014 Insignia now works with the upgraded HMI 2.5 using your file. 👏
Achilles, are you saying you can calc gm global b 12 byte?