[crunch]

The problem is the FS_readfile with empty name.
You have an entity in your map with no name in the .map file itself.

If it were an info_player problem, you would have seen "Cannot spawn player......." in the console.

You can fix this by:
1) open the .map file with Notepad, and search for a line with "" (double quotes with nothing between them.)
That is the entity with the problem. Either fill in the entity name (if you know it) or
2) go back into radiant and delete the entity.

Most likely it is an ammobox.

Kill Ya Later!