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Dear list, I have the following code: \xmlsetsetup{\xmldocument} {{header, #header}} {xml:titlepage} I guess this is right, but I get the following compilation error: tex error > tex error on line 303 in file pandoc-xhtml.tex: ! Illegal parameter number in definition of \14>:xml:pandoc <to be read again> h <argument> ...en:h1}\xmlsetsetup {\xmldocument }{{header, ##h eader}}{xml:titlepage}\xml... \syst_setups_start_xml_indeed ...1\expandafter {#3 } l.303 \stopxmlsetups If I replace the code above with the following one, everything compiles fine: \xmlsetsetup{\xmldocument} {{header, [id="header"]}} {xml:titlepage} Am I missing something, or what am I doing wrong here? Many thanks for your help, Pablo -- http://www.ousia.tk