I'm trying to use sensors.filamentMonitors[0].calibrated.totalDistance but I'm failing badly. The call worked twice but then it stopped after I rebooted. I've not worked out how to get it working again? I'm using this variable to set up an ercf to measure the distance of filament retracted for a change over.

I'm able to call attributes such as .status, .type, mmPerPulse etc.... everything but the one I need (.totalDistance). The configuration of the pulse filament meter is

M591 D0 P7 C"e0stop" S2 A1 R80:120 L1.95 E4.0

The error I get is:
M118 S{sensors.filamentMonitors[0].calibrated.totalDistance}
Error: line 22 column 8: M118: reached null object before end of selector string

??

M115
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 3.5.0-rc.3 ELECTRONICS: Duet WiFi 1.02 or later + DueX5 FIRMWARE_DATE: 2024-01-24 17:56:24

I upgraded to 3.5 and DWC and ever since the thermostatically controlled fans are now being displayed. Is this a bug or a feature? I would like them to be removed from the DWC

Duet Web Control 3.4.4
Board: Duet 2 WiFi (2WiFi)
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.5.0-rc.3 (2024-01-24)
Duet WiFi Server Version: 1.27

config.g
; Water Cooling System
M308 S3 P"duex.e2_temp" Y"thermistor" T9500 B4700 ; configure sensor 1 as thermistor on pin e0temp
M308 S3 A"Coolant Return" ;
;M950 H3 C"e2heat" T3 ; create chamber heater output on e1heat and map it to sensor 2
M308 S4 P"duex.e3_temp" Y"thermistor" T9500 B4700 ; configure sensor 1 as thermistor on pin e0temp
M308 S4 A"Coolant Out" ;
M950 F1 C"duex.fan7" Q250 ; create fan 0 on pin fan0 set frequency
M106 P1 S1.0 B0.2 H1 T40 C"Water Pump" ; Water Pump linked to H1
;M106 P1 H-1 C"Water Pump"
M950 F2 C"duex.fan6" Q250
M106 P2 S1.0 B0.2 H3 T30 C"Radiator" ; Cooling Fan linked to H1 Set P to P1 to test otherwise P=2