JTAG Device Chain is empty.

[efka]

I am using J-Link debugger.

I am programming nrf51822. On the Jlink commander my desktop sees my J-Link Lite CortexM device.

When I try the run an example on keil5 I got this error No cortex M device on chain.

How can I fix that?

[Andre]

The nRF51822 uses SWD, and not JTAG. When it says JTAG Device Chain emprty, could it be you have set the protocol to JTAG in stead of SWD?