https://devzone.nordicsemi.com/f/nordic-q-a/73816/keil-cannot-open-header-files-for-hal_adc-cHi, I am using Keil 5 (downloaded with this link: https://www.keil.com/demo/eval/c51.htm ) and have downloaded the nrfProbe to this file. This is being used to program the nRF24LE1. I have gone through the first tutorial of this (the short main()en-USTelligent Community 13Fri, 09 Apr 2021 21:58:57 GMThttps://devzone.nordicsemi.com/thread/304103?ContentTypeID=1Fri, 09 Apr 2021 21:58:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:996f8749-e457-4555-af13-2ab311f37e5eBDSL<p>Fixed it.</p><div style="clear:both;"></div>