Map won't compile

The map wont compile. I dont know what I've done, but suddenly the map can't be compiled, the log tells me "file not found", and no .bsp file is created in the tf/maps or the mapsrc folder. When tf2 is booted, the map is an old version of the map. Changing name wouldn't help and creating a fake .bsp doesn't work either. The data just wont be saved in the .bsp file. What's the problem and what caused it? Alt+P won't give me anything.

No that is not the problem. This has happened before when a friend sent me a vmf file that I compiled, but this time it just happened completely randomly.

This is what interloper's compile checker gave me:

A couple of strange leaks but that shouldnt be the problem;

And this:

find visible detail sides...bad detail brush side

Description:
The cause for this error is using multiple (incompatible) tool-textures on the same brush, or so it seems.

I've looked at all brushes with tool textures, but none of them have multiple different tool textures. May there be another solution? I don't want to get 10-15 hours of work spoiled by this.