Hello all,


the streams module could help typesetting my current work but all the
examples fail in mkiv.  (The output from mkii is impressive, though.)

The snippets I tried are from the comments of
http://source.contextgarden.net/tex/context/base/m-streams.tex
and another one from the wiki
http://wiki.contextgarden.net/Columns#Streams

Here are the ConTeXt error messages, seems that \FlushLeftAndRight is
the culprit but I don't really know where to start looking because the
command sequences are not legible in this truncated form.  (Is there
some switch that prevents ConTeXt from shortening the names at least in
the log file?)

-8<----------------------------------------------------------------------------
! Undefined control sequence.
\checkedfullsplitfirstmarks ...litfirstmarknumber 
                                                  #1\else \normalsplitfirstm...
\fetchmark ...sname \??mk \??mk #3\endcsname {#1}}
                                                  \fi \fi 
\erasemarknotes ...fetchmark [mn:#1][column:first]
                                                  }\edef \lastmarknote {0\fe...
\flushoutputstreams ...:\firstoutputstream :reset}
                                                  \directsetup {stream:\seco...
\@@ar@@1 ...lushoutputstreams [\v!left ,\v!right ]
                                                  \ifvoid \outputstreamtag \...
\redoloop ->\expandrecursecontent 
                                  \endofloop 
...
l.20 \FlushLeftAndRight
                       
? 
! Emergency stop.
\checkedfullsplitfirstmarks ...litfirstmarknumber 
                                                  #1\else \normalsplitfirstm...
\fetchmark ...sname \??mk \??mk #3\endcsname {#1}}
                                                  \fi \fi 
\erasemarknotes ...fetchmark [mn:#1][column:first]
                                                  }\edef \lastmarknote {0\fe...
\flushoutputstreams ...:\firstoutputstream :reset}
                                                  \directsetup {stream:\seco...
\@@ar@@1 ...lushoutputstreams [\v!left ,\v!right ]
                                                  \ifvoid \outputstreamtag \...
\redoloop ->\expandrecursecontent 
                                  \endofloop 
...
l.20 \FlushLeftAndRight
                       
!  ==> Fatal error occurred, no output PDF file produced!MTXrun | fatal error: return code: 1

-8<----------------------------------------------------------------------------
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