No Cortex-M SW Device Found

I have been working with a Nordic NRF51822. I have been working with this device for the past two weeks with no real issues. I have flashed the board multiple times from Keil. So today I was working...
no cortex-m sw device found

I have a stm32f4 discovery board , I installed keil and driver for st-link (st-link_v2_usbdriver). When I connect the board to pc I cant see any problem at device manager of PC and and at ST-LINK UTILITY...
reg:no cortex m sw device found

Can any one say clearly about this problem, i was trying to load the code but i am getting "no cortex m sw device found". Iam using Jtag to load the code
No Cortex-M SW Device Found

I am using the nordic nrf51822 Evaluation Kit and everytime I try to load the blinky project to the board an error message comes up saying no cortex-m sw device found. Device manager in window shows...
No Cortex-M SW Device Found

Hi friends. I have a blue pill discovery board (STM32F103C8) which I programmed several times but now I face with this error message. I made CubeMX file which create a file in Keil and I write code...