After several people reported problems with demos and existing projects after upgrading to e2 Studio 5.3, I decided to upgrade from e2 Studio 5.2.0 to the 5.3.1 and run several tests to try and replicate the errors.
I encountered no problems with either Renesas demo code or with my own code from my git repository that was built with e2 Studio 5.2.0. I suspect that the problems people encountered were due to the incorrect SSP versions and can easily be solved.
Identifying the SSP version
In the Project Explorer, select configuration.xml
Select the BSP tab.
Make sure you have the correct SSP version selected.
If you select the wrong SSP version, you will see a yellow triangle with an exclamation point in it.
You will most likely get a build error.
Here's what I did for my smooth upgrade. Hope it works for you too!
Testing GUIX Hello World
Downloaded from Renesas site.
Debug and Run Goes Smoothly
Use code from older git repo
Build Goes Smoothly
Debug and Transfer