CAMduct warning: The material/tool combinations listed below do not have any required tool data values set up

The material/tool combinations listed below do not have any required tool data values set up.

Default-Air Plasma: Ductwork: SUS304 x 1.000
Default-Air Plasma: Ductwork: SUS201 x 1.000

TL;DR

File -> Setup -> Installed Machines -> Select the machine name -> Check

Deal with any problem that it warns.