I'm not sure what happened with the latest updates. I've been searching fof the errors I'm getting here and I'm surprised noone has made any threads about it. Apparently this happend to multiple people, first reported for csgo hammer. The most werid thing is: it only affected a select few users. For example: it happened to a friend of mine after the first time the pyro update got live - my hammer was working normally. Spoiler: The errors he got: vvis launcher error: can't load vvis_dll.dll vrad_launcher error: can't load vrad_dll.dll The specified procedure could not be found. Today my TF2 got updated with the latest patch and now my hammer doesn't launch vrad. Spoiler: One more error, this is a bit different Valve Radiosity Simulator 8 threads [Reading texlights from 'lights.rad'] unknown light specifier type - lights This also happened to another guy. Not sure if I'm paranoid or doing something wrong, but this seriously drives me nuts. Things all of us tried to do: 1. Verify game cache - doesn't work 2. Point to a 2009/2013 SDK binaries - doesn't work 3. Only by copying the entire /bin content from 2013 SDK folder did the trick, but thats stupid. Is anyone else having the same problem here?