For that, we might need your model screenshot about details to identify, you can share this webpage link in your email and talk to your Ecotron contact by email if you don’t want to disclose something in forum and we can go from there.
Incorrect NVM data read may be a logic problem in the application layer. You can add some observations after reading NVM data to verify the logic step.
The size and data type of a fixed NVM definition are defined in the m file. You can edit your own m file to define NVM data.