Hi @shunyizhang
Sorry for not making myself clear.
I was trying to say that when you make any modifications in Config Tools, a window called "Update Files" shows up. This shows the changes that will be made to the code.
I made the same changes you shared in the FlexCAN_Ip_Example, and the following are the changes that you need to observe in your code:

Could you please validate if this tab in your S32DS shows the same changes? Could you share an image?