Ok, I have now a reduced version of my project which shows the problem. It's still quite big, but when I reduced it more, the problem didn't show up anymore. You can get the ZIP file here: https://dl.dropboxusercontent.com/u/35828/Test.zip

Something strange on top: The problem only shows when I run biber first. So the problem shows up with the following sequence:

`mk4ht oolatex dissschuerenlatex.tex my`
`biber dissschuerenlatex`
`mk4ht oolatex dissschuerenlatex.tex my?

After the first mk4ht run, I get a working .odt file, after the second run, no new file is produced.

Notice that I include several files with \include from my master file. If I comment the last one (Kapitel/philosophisches.tex) out, everything works fine. Even when I run biber.

I think it would be best to post the sources somewhere. xtpipes are used for math processing in .odt generation, so it might be some problem with invalid mathml code produced by tex4ht.

Without the source file, it is difficult to track down the error location and the causes for the errors.

Does it generate html that renders correctly in your browser? Does it parse OK? If not, it will not pass through xtpipes. Looks line you have missing closing tag for some elements.

Once it fails, strangely, the scripts triggered by t4ht grab all files in the directory and try to create an odt. Very strange behavior and is highly unreliable. I do not feel like relying on xtpipes, better, you might import the html in your preferred word processor and export to the word processor format.