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I believe what I am asking is extremely specific, but keeping hope that I might get some direction

I have used a clone ST- Link v2 programmer to download code into a NRF51822 Cortex M0 SOC from Nordic. In short, I have been following this guide here

http://icarus-sensors.github.io/general/starting-with-nRF51822.html

When I try to erase the flash of the chip using OpenOCD as said in the guide, I encounter this error

When I execute

nrf51 mass_erase The terminal says Unknown device (HWID 0x00000057)

Is this that the NRF51822 device is not recognised on the STLink is not recognized?

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Looking at the source it appears that HWID 0x00000057 is not supported. See the nrf51_known_devices_table from line 143 onwards.

Worth asking about this on the OpenOCD forum there.

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