No longer functioning in CS:S after update

[Metapyziks]

and possibly other games on that engine branch

[Arcaninesy]

I dusted off hammer editor a few days ago and tried to make a simple instance for CS:S, and yeah, it's not working.

The compile log seems to indicate success: Parsing f:\steam\steamapps\common\counter-strike source\cstrike\download\maps\arcs_multi_2\awpsub.vmf... Resolving instances for f:\steam\steamapps\common\counter-strike source\cstrike\download\maps\arcs_multi_2\awpsub.vmf... Inserting instance of arcs_multi_2/awpsub_glassinst.vmf at (4832 -3104 416), (0 0 0) Parsing arcs_multi_2/awpsub_glassinst.vmf... Resolving instances for f:\steam\steamapps\common\counter-strike source\cstrike\download\maps\arcs_multi_2\awpsub_glassinst.vmf... Instances resolved. Inserting instance of arcs_multi_2/awpsub_glassinst.vmf at (4768 -2400 416), (0 0 0) Instances resolved. Saving to f:\steam\steamapps\common\counter-strike source\cstrike\download\maps\arcs_multi_2\awpsub.temp.vmf...

However, in game I get this error: Attempted to create unknown entity type func_instance! Can't init func_instance Attempted to create unknown entity type func_instance! Can't init func_instance S

Any help would be greatly appreciated. I don't need to get it to work, as what I was planning on using instances for is super simple, but I've used vmfii extensively while mapping in the past and it was incredibly useful to me at the time.

I did try downloading the latest released version, and got the same result.