https://devzone.nordicsemi.com/f/nordic-q-a/23805/issue-with-programming-over-dfuHello, We have the following setup: SDK Version: nRF51_SDK_8.1.0 bootloader Version: dfu_dual_bank_ble_s110_pca10028.hex soft Device: s110_nrf51_8.0.0_softdevice.hex MCP Version: 3.10.0.14 We have implemented dfu service and codeen-USTelligent Community 13Tue, 12 Sep 2017 10:10:41 GMThttps://devzone.nordicsemi.com/thread/93641?ContentTypeID=1Tue, 12 Sep 2017 10:10:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fddf997e-7b14-4cf7-ae21-0446ea7fefcaprasanna<p>It ended up being services being doubled.Re-adding a service without clearing previous one led to multiple services which MCP could not handle.Using sd_softdevice_disable() before re-adding services did the trick</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/93640?ContentTypeID=1Thu, 27 Jul 2017 11:39:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:66b5d7f6-a81d-4a93-afc5-b797211a9c2fbjorn-spockeli<p>Hi Prasanna, could you attach the log file from Master Control Panel when the error occurs? Also are you seeing any issues if you perform the DFU from our nRF Toolbox or nRF Connect apps for Android or iOS? FIY: MCP has been deprecated in favor of our new nRF Connect for Desktop. Note: It only supports the new Secure Bootloader from SDK v12.x.x and newer.</p><div style="clear:both;"></div>