[NTG-context] getbuffer now fails

23 Mar 2008

      I had this code working (it was in an article I submitted for NTG-MAPS  
a while ago, july 2007). Now this same code gives an error on getbuffer.
What happened to getbuffer? Is it possible a \fi has disappeared in  
the getbuffer code between now and last july? Is there a quick patch  
because now I get stuck on work that has to be finished.

The error message from TeX:
! Incomplete \ifx; all text was ignored after line 6.
<inserted text>
                 \fi
<to be read again>
                    \relax
\dodoreadfile ...d \relax \fi \dodoreadfileindeed
                                                   \relax \the  
\everyafterrea...

\mkdobuffer #1->\beginrestorecatcodes #1
                                         \endrestorecatcodes
\dodobuffer ...dcsname \else #2\fi }\mkdobuffer #1
                                                   \popmacro  
\currentbuffer
\dodogetbuffer ...}\dobuffer {16}{#2}\mkgetbuffer
                                                   \getvalue {\??bu  
#1\c!after }
...
l.111 \question[number=1][buffer]{\getbuffer}

The relevant part of the code, not working is the call to \@exmbuffer:
	...
	\doifelse{#2}{\v!buffer}%
		{\def\filename{buffer}\def\thefile{#3}\let\@@exminput\@exmbuffer}%
		{.....}%
	\@@exminput\thefile
	\endgroup}
% reading the file better outside the doif
\def\@exminput#1{\input#1\relax}
\def\@exmbuffer#1{#1}

Help is appreciated.

Hans van der Meer