Hi Claudio Brunelli,
Thank you for your interest in NXP kinetis product, I would like to provide service for you.
I think you have mentioned FRDM-KL25 and FRDM-KL27, not FRDMK25 or FRDMK27.
When you open the SDK for FRDM-KL27, please use these folder code:
SDK_2.4.1_FRDM-KL27Z\boards\frdmkl27z\demo_apps
SDK_2.4.1_FRDM-KL27Z\boards\frdmkl27z\driver_examples
Don't use "middleware\multicore\erpc", that is just a middleware driver, not the project.
More details, just like FRDM-KL25, you can refer to the getting started page from the FRDM-KL27:
FRDM-KL27Z|Freedom Development Platform|Kinetis® MCU|NXP
Wish it helps you!
If you still have question about it, please kindly let me know.
Have a great day,
Kerry
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