No MaterialIDs in .vtu file

Hello everyone,
I used msh2vtu to convert my .msh file to .vtu files with their corresponding physical groups and uploaded them in this github repository:

my problem is that when I convert .msh file to .vtu files, only 321_physical_group_reservioree.vtu file which is correspond to reservoir have materialID and other .vtu files don’t have meterialID. I set
–ogs and --rdcd to True when I used msh2vtu.
I need materialID for fracture which I defined to reference in my .prj file.

I really appreciate if someone could help me.

Hi, I’m not very familiar with msh2vtu, but just an idea: could it be that your fracture elements (of lower dimension) were removed altogether?

– d