Hi, in my document I use utf-input. So do the index-marks: \enableregime[utf] \starttext START\startregister[index][umlautä]{Umlaute&– ä} \input knuth END\stopregister[index][umlautä] \placeregister[index][compress=yes] \stoptext Just, this can't be typset: ! Missing \endcsname inserted. <to be read again> \char \dochar #1->\char #1\relax \setgvalue #1->\expandafter \gdef \csname #1 \endcsname \dostartregister ... \setgvalue {\??id #1\??id #2} {\dodostopregister [#1][#3... l.5 ...rtregister[index][umlautä]{Umlaute&– ä} ? UTF in maintext but not in index-marks ... What can be done now (besides re-writting the document)? Steffen (MKII)