https://devzone.nordicsemi.com/f/nordic-q-a/28240/cannot-compile-nrf51-samplesI was compiling a project(ble_app_uart and I am using PCA10028), it was not successful and KEIL5 display this: it looks like I didn&#39;t install NordicSemiconductor.nRF_DeviceFamilyPack.8.11.1.pack according to the message (in fact, I already installeden-USTelligent Community 13Thu, 14 Dec 2017 07:06:59 GMThttps://devzone.nordicsemi.com/thread/111514?ContentTypeID=1Thu, 14 Dec 2017 07:06:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d0d7a302-5307-4a38-be24-9a4894a1676bJoakim Jakobsen<p>Glad it worked.<br /> Best regards,<br /> Joakim</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/111515?ContentTypeID=1Thu, 14 Dec 2017 02:35:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:75b18384-b7ef-468f-b460-3ed03462ecc4Summer<p>Hi Joakim, Like you said, I have copied the SDK files to c:/Nordic/, the problem is same. But after I deleted all SDK files and unzip nRF5_SDK_12.3.0_d7731ad.zip on this path, it works! Thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/111516?ContentTypeID=1Wed, 13 Dec 2017 16:01:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:34351783-77fc-40ba-9730-2165a4fc4554Joakim Jakobsen<p>Hi Summer!<br /> Could you open the &quot;Pack Installer&quot; in Keil and verify that the Device Family Pack is installed?<br /> Also, on a general note;<br /> Your project location is causing the path to be very long. You should try to install the SDK as close to the drive base folder as possible. i.e C:/nordic/sdk_xxx. This is too avoid the max path lenght (247char) as this might cause the examples not to compile. Also try to avoid white spaces in folder names etc.<br /> Best regards,<br /> Joakim.</p><div style="clear:both;"></div>