https://devzone.nordicsemi.com/f/nordic-q-a/667/using-keil-uv5-with-rf51822-4-4-1-sdkJust got the RF51822 PCA 1001 dev board and followed the instructions in SDK 4.4.1 and downloaded the Keil Lite tools from the ARM website. BUT, didn&#39;t realize Keil has (just) updated to uVision to version 5 and the SDK projects are at version 4. en-USTelligent Community 13Mon, 21 Oct 2013 14:26:55 GMThttps://devzone.nordicsemi.com/thread/3379?ContentTypeID=1Mon, 21 Oct 2013 14:26:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b6da68d6-f980-4e27-9aa0-9efff2afb884Ole Morten<p>I haven&#39;t seen any major problems when using UV5 with the nRF51822, but just for reference, would you care to comment with which exact components you installed?</p> <p>Feel free to accept your own answer, since you apparently solved your own problem! :-)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/3378?ContentTypeID=1Wed, 16 Oct 2013 22:41:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d2c181c-2187-4687-a014-9a90f15dde1dWard WIllats<p>Ah, never mind? Things seem to be working after a restart. All that legacy device package stuff I download from ARM must have fixed something.</p> <p>But, uh, why does /UV4/UV4.exe launch a uV5 UI ?</p><div style="clear:both;"></div>