https://devzone.nordicsemi.com/f/nordic-q-a/100709/build-issue-with-devacademy-lesson-3-exercise-2Hi all When building the example-project from the DevAcademy for NCS, lesson 3, exercise 2 everything went well when the &quot;myfunction&quot; filenames were written without an underscore. But when I renamed the files to &quot;my_function.c/h&quot;, the project coulden-USTelligent Community 13Mon, 12 Jun 2023 12:15:18 GMThttps://devzone.nordicsemi.com/thread/430478?ContentTypeID=1Mon, 12 Jun 2023 12:15:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6254ae54-b607-4445-a42c-f0b4197307ecRemo<p>Thanks for the quick reply and the solution.</p> <p>I totally forgot about the cmakelist file.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/430467?ContentTypeID=1Mon, 12 Jun 2023 11:56:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c4ba2e2-3f26-4666-8b99-e06ebf967684runsiv<p>Hi,&nbsp;</p> <p>I had a quick look and it seems like you forgot to update your cmakelist.txt when you changed the filename to my_function.c/h</p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>