Issue with programming over dfu

[prasanna]

Hello,

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 code from buttonless_dfu example.To do this, we have added files "bootloader_util.c","dfu_app_handler.c" and "ble_dfu.c" to our builds and used same code in main as the example.

Sometimes dfu is successful but sometimes we receive attached error.What could be the issue ?

Tx-20 program fail screen.tif

[prasanna]

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