[NTG-context] No cross-references in scrollmode

Hello, when I pipe a file to context, it cannot resolve references, e. g. to figures or chapters: cat source.tex | context --pipe Instead of the number, "??" is printed in the PDF document. A minimal example is: \ref[reference] \placefigure[][reference]{}{} The command line output is like this: [...] mtx-context | entering scrollmode, end job with \endThis is LuaTeX, Version 0.95.0 (TeX Live 2016/Arch Linux) system commands enabled. [...] * * *(Please type a command or say `\end') *structure > sectioning > title @ level 2 : 0.0 -> Si(111) preparation *(Please type a command or say `\end') * * * * * * * * * *references > unknown reference '[][fig:si-oxide]' [...] Kind regards, Andreas Becker