J-Link does not suport memory access

[phipi]

I keep getting this warning when trying to program an NRF51 DK:

Any idea what this means or how to fix it?

Here's the log:

* JLink Info: Device "NRF51822_XXAC" selected.
 
JLink info:
------------
DLL: V5.12f, compiled May 17 2016 16:03:35
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar  2 2017 12:22:13
Hardware: V1.00
S/N : 681309441 
 
* JLink Info: Found SWD-DP with ID 0x0BB11477
* JLink Info: Found Cortex-M0 r0p0, Little endian.
* JLink Info: FPUnit: 4 code (BP) slots and 0 literal slots
* JLink Info: CoreSight components:
* JLink Info: ROMTbl 0 @ F0000000
* JLink Info: ROMTbl 0 [0]: F00FF000, CID: B105100D, PID: 000BB471 ROM Table
* JLink Info: ROMTbl 1 @ E00FF000
* JLink Info: ROMTbl 1 [0]: FFF0F000, CID: B105E00D, PID: 000BB008 SCS
* JLink Info: ROMTbl 1 [1]: FFF02000, CID: B105E00D, PID: 000BB00A DWT
* JLink Info: ROMTbl 1 [2]: FFF03000, CID: B105E00D, PID: 000BB00B FPB
* JLink Info: ROMTbl 0 [1]: 00002000, CID: B105900D, PID: 000BB9A3 ???
ROMTableAddr = 0xF0000000
 
Target info:
------------
Device: nRF51822_xxAC
VTarget = 3.300V
State of Pins: 
TCK: 0, TDI: 1, TDO: 1, TMS: 1, TRES: 1, TRST: 1
Hardware-Breakpoints: 4
Software-Breakpoints: 8192
Watchpoints:          2
JTAG speed: 1000 kHz
 
Erase Done.
Programming Done.
Verify OK.
**JLink Warning: Mis-aligned memory write: Address: 0x20000000, NumBytes: 2, Alignment: 2 (Halfword-aligned)
Flash Load finished at 10:07:26

[Jørgen Holmefjord]

Hi,

Please check if this thread helps you solve the issue.

Best regards,

Jørgen

[phipi]

Looks like reinstalling the segger drivers did the trick.

[Harish_Vanganuru]

Install/ Update to the latest version of J-link of Segger.

1)Visit

https://www.segger.com/downloads/jlink/#J-LinkSoftwareAndDocumentationPack

2)Press on  "Click for downloads" under J-Link Software and Documentation Pack & Download.

3) Install and you can choose the update option if you have the software already.