Hi shunyizhang,
For question 1, please install all required package (update site package, development package, service package...) regarding to the version that be mentioned in Release Notes.
Then please try 2 ways of this upgrade version:
- Using the migration of the package, by hit the right click in the project > Migrate > Follow the steps.
- Import your .mex configuration into the new project of 4.0.0, by hit the right click in the project > Import > S32 Configuration Tools > Import Configuration > Follow the steps that lead to your 3.0.0 project.
For question 2, i'm not check yet but i think it's an issue with version of Os module. Due to 4.0.0 supports the different version of Os module, so please check the required version and try to install package > import again.
Please take these as suggestions and help me to try.
Thank you,
Nam.