https://devzone.nordicsemi.com/f/nordic-q-a/33800/installing-nrf-connect-v2-3-0-breaks-existing-sdk-v15-0-0-keil-projectI had used the examples\peripheral\blinky\pca10040\blank\arm5_no_packs Keil project from nRF-SDK v15.0.0 using Keil MDK v5.25. EDIT: as described here: http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Fgetting_started_examplesen-USTelligent Community 13Thu, 26 Apr 2018 12:11:06 GMThttps://devzone.nordicsemi.com/thread/129937?ContentTypeID=1Thu, 26 Apr 2018 12:11:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cabaccbe-e5e1-4873-9b03-2b406303af63Joakim Jakobsen<p>I haven&#39;t experienced this myself.</p> <p>But thanks for sharing the solution. <br />Be sure to let us know if you have any other questions.</p> <p>Best regards, <br />Joakim.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/129832?ContentTypeID=1Wed, 25 Apr 2018 15:47:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:791066ab-0b42-4331-bb1c-afbfefec833eawneil[quote userid="6462" url="~/f/nordic-q-a/33800/installing-nrf-connect-v2-3-0-breaks-existing-sdk-v15-0-0-keil-project"]How do I fix it?[/quote] <p>Quickest way: just restore the last version from before nRF Connect messed it up!</p> <p></p> <p>Keil obfuscate this by having no mention whatsoever of anything about Packs in the Target properties!</p> <p></p> <p>In fact, it&#39;s this button:</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1524671073012v1.png" alt=" " /></p> <p>So the Packs <em>are</em> set per-Target - but are <em>not</em> set in the Target properties!</p> <p></p> <p>The difference between the 2 Targets here seems to be that one has a fixed, specific Packs version; while the other is just using &quot;latest&quot;.</p> <p>Dunno why there should be a difference - since the second Target was just created as a copy of the first.</p><div style="clear:both;"></div>