https://devzone.nordicsemi.com/f/nordic-q-a/19600/nrf51-dk-and-nrf52-dk-blinky-with-keil-mdk-lite-5-22-not-doing-breakpointsWhy can&#39;t I breakpoint or step blinky, using kiel MDK lite? Comment --- I suggest Nordic do videos or provide exact steps for how to setup-run the base example (like Blinky) using the built in seggerob to breakpoint and step on a main development ideen-USTelligent Community 13Thu, 09 Feb 2017 23:51:17 GMThttps://devzone.nordicsemi.com/thread/76264?ContentTypeID=1Thu, 09 Feb 2017 23:51:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6f8adc95-d4e5-4867-9521-09eac8584d2fthoughtful<p>It is now working for me. I am in a parallels VM on a mac running a windows 10 pro image, I have the nRF5_SDK-12.2.0 on the windows desktop. I selected the keil project file via a path \Mac\Home\Desktop\nRF5_SDK-12.2.0\examples\peripheral\blinky\pca10040 rather than z:\Desktop\nRF5_SDK-12.2.0\examples\peripheral\blinky\pca10040 ... apparently for reasons I do not know the network path starting with \home fails to allow breakpoints to work! Sorry for not including the important clue but WE/I just learned another way to make it NOT work!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/76263?ContentTypeID=1Thu, 09 Feb 2017 23:21:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7fc07825-3856-4dfa-8c93-a9831886e972thoughtful<p>Thank you for your answer.<br /> I had read before making this post, that changing the optimization to 0 worked for someone here. Unfortunately it does NOT for me. That is why I said ... &quot;Code Gen with Optimization of Level 3 or Level 0 makes no difference&quot;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/76262?ContentTypeID=1Thu, 09 Feb 2017 21:30:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b051a70c-a452-4b55-b1e6-c61cc3a852e8Wojtek<p>Turn optimization to 0, and recompile WHOLE project (rebuild) and it will just work.</p><div style="clear:both;"></div>