GD32 UBL ProUi fails to print Min Temp error

[npaisnel]

I have jsut put this firmware on an Aquila 1
Bed tramming, PID Tune, create mesh, set bed size, se Z offset etc.

Trying to print a set of 20mm x 0.2mm test squares to check z-offser.

Printing from SD card, G-code from Cura
Not sure about what Start Code should be in the Cura settings page though..that could be the issue?

but the bed and nozzle heats up to temperature
The Homing procedure starts
Then get a MINTEMP warning ..Shut the printer down, and it tells me bed temp is too low..whilst it is still up at temperature.
This is not a printer hardware error as If i go back to stock firmware stall works perfectly.

This is the g-code attached
CE3_PrimeBlock_20x20x1.gcode.zip

[npaisnel]

Unable to repeat....thinking maybe hardware glitch / PSU issue..dry joint maybe ...but can be ignored...