@chrishamm that seemed to work running a simulation. I didn't know P defined the tool I thought T did.
Just ruining a real print now, so I'll soon know.
Thank you

@chrishamm if you are referring to the miscellaneous section. i have already tried that and running a simulation gave the same error. is i put it back to how it was before

Hi
can anyone solve this issue i'm having.
when printing more the one object in one at a time mode, I get "Error: Attempting to extrude with no tool selected" when the second object starts to print.
I think this is a T0/T1 issue going by posts with similar problems but the suggestions on there don't seem to be working or I've missed the fix.
normal printing is ok without any tool selection issues

printer. ender 3 v2 with hemera single head
duet 3 mini 3 wifi+ fw 3.4.5 dwc 3.4.4 wifi 1.27
cura 5.2.1

cura scripts are standard
current duet config file below

config.g

file attempting to print. 1st model ends layer 60 which is line 10723
looser_chain x4.gcode

thanks for your help