Hi, one problem fixed, the next one is knocking on the door. This must be the definition of a lucky man ;) Can anybody try the following code? Mhh, no problems on 'context live' (luatex 0.25.2). % engine=luatex \starttext \externalfigure[notfound.png] \stoptext results here in [..] ! Missing number, treated as zero. <to be read again> \relax \BeforeGroup ...medparameter \c!backgroundscreen } \bgroup \aftergroup \After... <argument> ...amedparameter \c!backgroundscreen ]{ \dofilledbox } \secondoftwoarguments #1#2->#2 \next1 ...d {\??ov \currentbackground }\donothing }}}\wd \extraframebox \zer... \rawprocesscommaitem ...commalevel \endcsname {#1} \expandafter \rawprocessco... ... l.9 Regards, Peter