Help !!!
I'm trying to compile a LaTeX document that was compiled earlier, but now for some reason it just won't work. The error message I get is not very informative, and I can’t even find the file that it points to.
Details: I use Aquamacs, and when I try to compile a document, the mini-buffer displays the following message:

When I press Cc `, this is what I get:
--- TeX said --- \ Hy @AtBeginDocument → \ ltx @LocalAppendToMacro
\ Hy @AtBeginDocumentHook l.735
... r \ Hy @AtBeginDocument \ expandafter {\ Hy @ pace
}
--- HELP --- TeX ran into unknown team name. You are probably mistakenly spelled the name. If this message occurs when the LaTeX command is processed, the command is probably in the wrong place - for example, an error may be caused by the \ item command that is not inside the list creation. The error may also be caused by the absence of \ documentclass.
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:)