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The whole missing map thing is just an affect. It's not a problem in it's own since it's caused by something else...
In this case this:
Find Visible Detail Sides...Bad detail brush side
In short: You've used multiple, incompatible tool-textures on a single brush.
Not exactly sure which combinations are fatal to the compile, so I'll assume anything except of HINT and SKIP on the same brush is a possible cause.
If your map is very complicated and you've used a whole lot of tool textures, this might be a bit tricky to find since it doesn't give coordinates or a brush number.
Go to your VIGGroups on the right side of hammer and disable every group not involving any tool textures (models, entities, displacements, etc) and start looking through wherever you've used tool textures.
If it indeed is a big, complicated map, you could also use Gordon Tools to narrow down the search area.
The cause for this error is using multiple (incompatible) tool-textures on the same brush, or so it seems.
Apart from HINT and SKIP there aren't much combination of tool-textures allowed on the same brush, so any other combination is a possible cause. Tool-textures are the 'tools/' textures you can find using the texture browser in Hammer, and that have a special meaning.
You will need to find the brush(es) with these tool-textures and replace those textures. The easiest way to find the source of the error is to hide all visgroups except for the visgroups which are for tools textures and then just look around the map in 3d textured mode.