Hi, there seems to be confusion with register entries vs. register ranges. Please have a look: \starttext KNUTH ONE entry \index{Knuth} \page \input knuth KNUTH START\startregister[index][knuthrange1]{Knuth} \input knuth KNUTH END\stopregister[index][knuthrange1] \dorecurse{10}{\input zapf } KNUTH START\startregister[index][knuthrange2]{Knuth} \dorecurse{10}{\input knuth } KNUTH END\stopregister[index][knuthrange2] %\placeregister[index]% gives 1,2, 4-6 \placeregister[index][compress=yes]% gives 1-2, 4, 6 \stoptext Switching compression on breaks start/stopregister! Steffen