https://devzone.nordicsemi.com/f/nordic-q-a/24405/mesh-sdk-0-9-1-on-pca10028---light-control-demo---hard-faultPost in reference to link After flashing light control server or client app on PCA10028 app crashes with HARD FAULT. Steps how I built the app: Using freshly downloaded MESH SDK 0.9.1. ble_mesh_v0.9.1-Alpha&gt;mkdir build ble_mesh_v0.9.1-Alphaen-USTelligent Community 13Thu, 17 Aug 2017 06:36:36 GMThttps://devzone.nordicsemi.com/thread/96132?ContentTypeID=1Thu, 17 Aug 2017 06:36:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e1de2875-acb2-4843-83a1-40188aa2681cJakub J.<p>Tusen takk! That was the case, now it works fine.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/96131?ContentTypeID=1Wed, 16 Aug 2017 18:25:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f11ea8f0-a933-44ea-a6f8-7323e99d3923Thomas Stenersen<p>Hi Jakub,</p> <p>I would avoid using nRFgo Studio as it is deprecated. I suspect your issue is that you&#39;ve flashed the SoftDevice with SoftDevice protection enabled (which is probably default in nRFgo Studio). Disable it and it should work fine. This is only an issue with nRF51.</p> <p>We see that this is confusing and have reported the issue internally.</p> <p>Best,<br /> Thomas</p><div style="clear:both;"></div>