[HELP] Map compiles improperly, all props are gone
So I compile my map, and I get the error of invalid solids.
I've had it before.
However, something strange happened when I re-opened the map in hammer.
It gave me the usual warning to delete x amount of invalid solids and resave the map.
When I clicked 'yes', hammer crashed.
When I re-opened hammer, I loaded the file, and voila - every single one of my props is gone (even my overlays!). And a few func_details too (I'm assuming they were the invalid brushes)
Now I'm not too mad since I had a backup from the day before, but I'm just confused as why an invalid brush caused all my props to be deleted.
And no, the visleaf isn't hidden. There isn't even a 'prop' visleaf category anymore.
I tried this again with the .vmx file and the same thing happened.
Is there any way to fix this (or at least explain it)? I have a copy of the file before I opened it and got the error, and a copy of the compile log.
Sorry if this has been posted before, but I couldn't find anything like it.