Hi Troy,
I don't have the graph.mp file, but I have seen similar errors here. I
guess if you change the lines into
Gmargin.low:=-.07;
Gmargin.high:=1.07;
things work again. Sorry, I can't remember the reason why equations
cause trouble in mplib. But I'm quite sure that this is only an
incompatibility and not a bug.
Best wishes, Peter
Am 02.03.2010 17:34, schrieb Troy Henderson:
> The following example produces expected output with MKII (texexec) but
> fails the compilation process with MKIV (context).
>
> \startuseMPgraphic{foo}
> input graph;
> path p;
> gdata("data.d", $, augment.p($1,$2););
> draw begingraph(4in,2.5in);
> gdraw p;
> endgraph;
> \stopuseMPgraphic
> \starttext
> \useMPgraphic{foo}
> \stoptext
>
>
> The data stored in data.d is as follows:
> 0 0
> 1 1
> 2 4
>
> When compiling with MKIV, the following error occurs:
>
> !mplib : mp terminal:
> (/opt/context-minimals/tex/texmf/metapost/base/graph.mp
> ! Redundant equation.
> <to be read again>
> ;
> l.143 Gmargin.low=-.07;
> % bbox fraction for default
> ra...
>
> ! Redundant equation.
> <to be read again>
> ;
> l.144 Gmargin.high=1.07;
> % bbox fraction for default
> ra...
>
> )
>
> !mplib : mp error: unknown, no error, terminal or log messages
> !mplib : mp terminal: [1]
>
> !mplib : mp error: unknown, no error, terminal or log messages
>
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