Hi
thanks for your reply on this topic.
I was checking the paths that were set in the compiler settings. Unfortunately I did not find the referenced files, where I could include the in the compiler settings.
I was using the Design Studio 3.5 but I also replicated the same situation with DS 3.6. Please see attached below a screenshot about the installation details. In this you can see that the RTD was installed.

About the example application, I was trying to modify one clock setting on this example: S32K312_ADKP_Provision.
I also did a second attempt in configuring the Clocks without the RTD (since the example project is not an AUTOSAR project). Therefore I removed the RTD Packages from my installation. When I tried to open the configuration for the clocks the following error appears:

When I tried to install the configuration extension for S32K3 I got the following message

I am currently out of options. Please help me how I could go further on those points...