Making mass from rooms using Direct Shape Node

Hello everyone,

good day today indeed :)…

I want to convert rooms into the mass category using node Direct Shape and there is just one small thing. On one room I am getting that the material is not asign to it and this room I can’t override it with view filter. Is somebody knows what could be a problem?

Thank you in advnce for your reply and wish you all good day.

Damir