False alarm. The fact that E3D Hemera stepper motor has a bit different pairing than usual Nema 17 motors lead to the error. Simply switching wires to have correct pairs solved the problem.

Been building the RatRig Core v3 kit, pretty much finished with everything: successful offset calibration; mesh compensation; pid tuning of hotend and bed; everything else works except the extruder which is on Driver 5 (extension board).

I get the error by trying to initiate extrude/retract command: Error: short-to-ground reported by driver(s) 5

Triple checked the wiring, everything seems to be in the correct places.

Did I miss something?

Duet 3 Mini 5+ with dual stepper expansion board.

*Error: short-to-ground reported by driver(s) 5
12/8/2021, 2:03:43 PM m122
=== Diagnostics ===
RepRapFirmware for Duet 3 Mini 5+ version 3.2.2 running on Duet 3 Mini5plus WiFi (standalone mode)
Board ID: G2SXS-Y296U-D65J0-40KM0-2313Z-RX229
Used output buffers: 3 of 40 (11 max)
=== RTOS ===
Static ram: 98732
Dynamic ram: 107976 of which 52 recycled
Never used RAM 38456, free system stack 120 words
Tasks: NETWORK(ready,198) HEAT(blocked,315) CanReceiv(blocked,947) CanSender(blocked,358) CanClock(blocked,363) TMC(blocked,106) MAIN(running,402) IDLE(ready,20) AIN(blocked,264)
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 00:05:27 ago, cause: power up
Last software reset at 2021-12-08 13:18, reason: User, GCodes spinning, available RAM 38664, slot 1
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00000000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Aux1 errors 0,0,0
Supply voltage: min 0.0, current 24.1, max 24.2, under voltage events: 0, over voltage events: 0, power good: yes
Driver 0: position 32000, standstill, SG min/max 0/14, read errors 0, write errors 0, ifcnt 13, reads 65284, writes 13, timeouts 34, DMA errors 0, failedOp 0x41
Driver 1: position 0, standstill, SG min/max 0/22, read errors 0, write errors 0, ifcnt 13, reads 65249, writes 13, timeouts 69, DMA errors 0, failedOp 0x71
Driver 2: position 8719, standstill, SG min/max 0/14, read errors 0, write errors 0, ifcnt 13, reads 65294, writes 13, timeouts 24, DMA errors 0, failedOp 0x72
Driver 3: position 0, standstill, SG min/max 0/20, read errors 0, write errors 0, ifcnt 13, reads 65166, writes 13, timeouts 151, DMA errors 0, failedOp 0x6a
Driver 4: position 0, standstill, SG min/max 0/2, read errors 0, write errors 0, ifcnt 13, reads 65318, writes 13, timeouts 0, DMA errors 0
Driver 5: position 0, short-to-ground, standstill, SG min/max 0/4, read errors 0, write errors 0, ifcnt 13, reads 65318, writes 13, timeouts 0, DMA errors 0
Driver 6: position 0, standstill, SG min/max 0/0, read errors 0, write errors 0, ifcnt 9, reads 65322, writes 9, timeouts 0, DMA errors 0
Date/time: 2021-12-08 14:03:42
Cache data hit count 661292756
Slowest loop: 17.41ms; fastest: 0.12ms
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 22.5MBytes/sec
SD card longest read time 3.9ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 158409ms, bed compensation in use: mesh, comp offset -0.044
=== MainDDARing ===
Scheduled moves 16, completed moves 16, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 1], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1, chamberHeaters = -1 -1
Heater 1 is on, I-accum = 0.8
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 14.65ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8

• WiFi -
  Network state is active
  WiFi module is connected to access point
  Failed messages: pending 0, notready 0, noresp 0
  WiFi firmware version 1.25
  WiFi MAC address d8:bf:c0:14:e9:9f
  WiFi Vcc 3.36, reset reason Power up
  WiFi flash size 2097152, free heap 23680
  WiFi IP address 192.168.1.91
  WiFi signal strength -65dBm, mode 802.11n, reconnections 0, sleep mode modem
  Clock register 00002002
  Socket states: 0 0 0 0 0 0 0 0
  === CAN ===
  Messages queued 2950, send timeouts 2947, received 0, lost 0, longest wait 0ms for reply type 0, free buffers 16*