Been trying to export a physics model (.smd) for a while for a gmod addon, but I realized that every time it exports its missing the vertex group number and instead has "0" in its place for every variable, thus making my physics model non functional. In tried this with a base model too and it does it every time. I have old files to compare it too, I don't know if im missing a step or what but any help would be appreciated...

More info:
https://psteamcommunity.yuanyoumao.com/app/4000/discussions/1/5239403117937867418/