Dear all,
I'm running into the following issue:
Hardware
nRF5340-DK, 2.0.0, 2021.42
Software
SES for ARM Nordic Edition, V5.68 (64-bit)
nRF-Command-Line-Tools-10.15.4-x64.exe
'empty_app_core' for _cpuapp
'ptx' for _cpunet
No changes to the installation or code after installation.
When trying to load 'empty_app_core' for _cpuapp, the following error will usually occur
Preparing target for download
Executing Reset script TargetInterface.resetAndStop()
Reset: ARMv8M core with Security Extension enabled detected.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Downloading ‘zephyr.elf’ to J-Link
Programming 3.8 KB of addresses 00000000 — 00000f37
Programming 0.0 KB of addresses 00000f38 — 00000f9b
Failed to prepare for programming.
Could not preserve target memory.
Failed to download application.
Generic error.
Please check J-Link and target connection.
Download failed.
The same will happen for 'ptx' on _cpunet.
Following the advice I found on the board, I was running a recovery on both cores
nrfjprog --recover --coprocessor CP_NETWORK
nrfjprog --recover
Which allowed to load 'empty_app_core' - but only once.
After loading 'empty_app_core' once, it is also possible to load 'ptx' for _cpunet, once.
Running a recovery again will allow to load again, once.
Any ideas? 
Thank you!
