Hi all, the mkiv definition of \openoutputfile adds undesired braces to filenames like “{out}.testfile2” and “{out.testfile3}”. ··8<····························································· \newwrite \testme %\openout \testme \jobname.testfile %%% works \openoutputfile \testme \jobname.testfile2 \openoutputfile \testme {\jobname.testfile3} \starttext irrelevant \stoptext ··8<····························································· mkii is fine. (Although I prefer plain \openout.) Philipp