Today I hit the same error with biblatex and tex4ht described in this thread:
footnote citation styles produce a "Missing \begin{document}" error in the
tex4ht run. Just in case it's some help to the maintainers as they debug, may I
mention a kludge which seems to help?
Noticing that the error had to do with the biblatex package variable
\abx@aux@fnpage, I checked to see how biblatex.4ht treats this variable.
Answer: not quite analogously to how it treats \abx@aux@page. So I tried simply
adding the line
\let\abx@aux@fnpage\@gobbletwo
right after biblatex.4ht, l. 170 (this is in the biblatex.4ht in the trunk of
the svn repository). Cf. biblatex.sty as well for the handling of this variable.
Now I can htlatex a test file, with footnote cites, and not get errors during
the tex4ht run. The resulting HTML looks correct. Obviously I haven't tested
this much, and I do not understand the underlying biblatex or tex4ht code. But
maybe this idea will help zero in on the problem.
Now really I don't want to produce HTML but ODT. oolatex also runs without
errors, and produces correct-looking footnotes. But there is a separate bug in
oolatex's code for handling the list of references (\printbibliography), which
comes out blank. I have some ideas about that, but that's for another thread.
Best,
Andrew Goldstone
