I hope I have documented my project enough here so that you can get things resolved. I am using the nRF51 Development Kit and Kiel 5 running on WIN 10 and the nRF5_SDK_15.0.0_a53641a software development kit. when I load ble_app_uart_pca10040_s132 it says that Third party device support for "Nordic Semiconductor:nRF52832_xxAA" Device not included in legacy device database. Clicking the errormessage allows the example to open. When the example code has loaded, the message below is displayed at the very bottom even though I have downloaded and installed the toolkit. *** Error: Project 'ble_app_uart_pca10040_s132' requires 'ARM' Toolchain which is not installed. The target is fixed at nrf52832_xxaa and I am unable to select the target on the last line below which was the original target. If I use the SDK which I used with Kiel 4 nRF5_SDK_12.3.0_d7731ad when I load ble_app_uart_pca10040_s132 it says that Third party device support for "Nordic Semiconductor:nRF51422_xxAC" Device not included in legacy device database. Clicking the errormessage allows the example to open. *** Error: Project 'ble_app_uart_pca10028_s130' requires 'ARM' Toolchain which is not installed. In this case the target is the original Keil 4 target of nrf51422_xxac