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I don't understand this error: (/usr/local/texlive/2007/../texmf-local/tex/context/base/spec-tst.tex) interaction : active(./prd_05.tuo) (./prd_05.tuo! Improper alphabetic constant.<to be read again> \footnote <argument> \ifnum `\footnote =255 32 \else `\footnote \fi \utfdiv #1->\the \numexpr \ifcase \numexpr #1 \relax 0\else (#1- \utf@g )/\utf... \PDFunicodechar ...bers \@EA {\number \utfdiv {#1} }\@EA \lchexnumbers \@EA {... \nodoPDFuni ...ar {\ifnum `#1=255 32\else `#1 \fi } \doPDFuni \bookmarktext ...-?und?Erziehungsauftrag \footnote {H.?P.,? Humanist?R......l.176 ...ion for Europe}{2--0-7-0-0-0-0-0--49} {50} %? eNo pages of output. It seems to be caused by this line, i.e. by the footnote: \section{Bildungs- und Erziehungsauftrag\footnote{H. P., Humanist Road to European Citizenship, Zitate aus Verfassungen, 15.\,12.\,2007}} And in the TUO file there's: \mainreference{}{fnt:t:5}{2--0-6-5-0-0-0-0--45}{46}{}%\pospxywhd{text: 47}{47}{42.67912pt}{62.59607pt}{327.20668pt}{489.38742pt}{0.0pt}% \listentry{subsection}{76}{}{Baden-Württemberg}{2--0-6-6-16-0-0-0--46} {47}%\listentry{subsection}{77}{}{Bayern}{2--0-6-6-17-0-0-0--46}{47}% \listentry{subsection}{78}{}{Brandenburg}{2--0-6-6-18-0-0-0--46}{47}% \listentry{subsection}{79}{}{Berlin}{2--0-6-6-19-0-0-0--46}{47}% \listentry{subsection}{80}{}{Bremen}{2--0-6-6-20-0-0-0--46}{47}% \listentry{section}{81}{}{Bildungs- und Erziehungsauftrag\footnote {H. P., Humanist Road to European Citizenship, Zitate aus Verfassungen, 15.\,12.\,2007}}{2--0-6-7-0-0-0-0--46}{47}% \mainreference{}{fnt:f:6}{2--0-6-7-0-0-0-0--46}{47}{}%\listentry {subsection}{115}{}{Hessen}{2--0-6-7-34-0-0-0--46}{47}%\listentry {subsection}{116}{}{Mecklenburg-Vorpommern}{2--0-6-7-35-0-0-0--46} {47}%\listentry{subsection}{117}{}{Niedersachsen} {2--0-6-7-36-0-0-0--46}{47}% What's wrong? Greetlings from Lake Constance! Hraban --- http://www.fiee.net https://www.cacert.org (I'm an assurer)