As requested the output of M122 is as follows
M122
=== Diagnostics ===
Used output buffers: 3 of 32 (13 max)
=== Platform ===
RepRapFirmware for Duet WiFi version 1.19 running on Duet WiFi 1.0
Board ID: 08DDM-9FAM2-LW4S4-6JTD8-3SJ6J-TMVZY
Static ram used: 21176
Dynamic ram used: 95912
Recycled dynamic ram: 1696
Stack ram used: 1304 current, 4912 maximum
Never used ram: 7376
Last reset 00:09:15 ago, cause: power up
Last software reset reason: User, spinning module GCodes, available RAM 7440 bytes (slot 2)
Software reset code 0x0003, HFSR 0x00000000, CFSR 0x00000000, ICSR 0x00400000, BFAR 0xe000ed38, SP 0xffffffff
Error status: 0
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest block write time: 0.0ms
MCU temperature: min 41.4, current 41.8, max 42.1
Supply voltage: min 11.5, current 11.9, max 12.2, under voltage events: 0, over voltage events: 0
Driver 0: stalled standstill
Driver 1: stalled standstill
Driver 2: stalled standstill
Driver 3: standstill
Driver 4: standstill
Date/time: 2017-10-26 09:42:43
Slowest main loop (seconds): 0.014099; fastest: 0.000061
=== Move ===
MaxReps: 0, StepErrors: 0, FreeDm: 240, MinFreeDm 240, MaxWait: 0ms, Underruns: 0, 0
Scheduled moves: 146, completed moves: 146
Bed compensation in use: mesh
Bed probe heights: 0.000 0.000 0.000 0.000 0.000
=== Heat ===
Bed heater = 0, chamber heater = -1
Heater 1 is on, I-accum = 0.4
=== GCodes ===
Segments left: 0
Stack records: 2 allocated, 0 in use
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
serial is idle in state(s) 0
aux is idle in state(s) 0
daemon is idle in state(s) 0
queue is idle in state(s) 0
autopause is idle in state(s) 0
Code queue is empty.
Network state is running
WiFi module is connected to access point
WiFi firmware version 1.19
WiFi MAC address 2c:3a:e8:0b:11:8b
WiFi Vcc 3.15, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 39168
WiFi IP address 192.168.1.15
WiFi signal strength -27dBm
HTTP sessions: 1 of 8
Socket states: 2 0 0 0 0 0 0 0
Responder states: HTTP(1) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
It appears as though the probe heights are not being recorded despite this output from the MeshLevel macro
M98 P0:/macros/MeshLevel
42 points probed, mean error 0.029, deviation 0.022
Height map saved to file heightmap.csv
Height map saved to file heightmap.csv