[NTG-Context] MetaPost capacity exceeded.

[NTG-Context] MetaPost capacity exceeded.

[Alan BRASLAU]

! MetaPost capacity exceeded, sorry [expansion depth=10000].

I have come across this error previously
with run-away \dorecurse loops

I now have this message with a document that makes VERY heavy
use of MetaPost; I just have too many figures.

Is there some way to "flush" the running instance of MetaPost,
that is to force MPlib to respawn or something like that?
(Of course, I would then have to be careful not to rely on the
reuse of any previous MP instances...)

Alan 
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Re: [NTG-Context] MetaPost capacity exceeded.

[Hans Hagen]

On 11/15/2012 12:27 PM, Alan BRASLAU wrote:
>
> ! MetaPost capacity exceeded, sorry [expansion depth=10000].

this normally points to an error in mp code, not to instances

> I have come across this error previously
> with run-away \dorecurse loops
>
> I now have this message with a document that makes VERY heavy
> use of MetaPost; I just have too many figures.
>
> Is there some way to "flush" the running instance of MetaPost,
> that is to force MPlib to respawn or something like that?
> (Of course, I would then have to be careful not to rely on the
> reuse of any previous MP instances...)

yes:

\starttext

\defineMPinstance
   [myfun-a]
   [format=metafun]

\defineMPinstance
   [myfun-b]
   [format=metafun]

\startMPdefinitions{myfun-a}
     color MyColor ; MyColor := (1,0,0) ;
\stopMPdefinitions

\startMPdefinitions{myfun-b}
     color MyColor ; MyColor := (0,1,0) ;
\stopMPdefinitions

\startuseMPgraphic{myfun-a::test-1}
     fill fullcircle scaled 1cm withcolor MyColor  ;
\stopuseMPgraphic

\startuseMPgraphic{myfun-a::test-2}
     fill fullcircle scaled 1cm withcolor MyColor ;
\stopuseMPgraphic

\startuseMPgraphic{myfun-b::test-1}
     fill fullcircle scaled 1cm withcolor MyColor  ;
\stopuseMPgraphic

\startuseMPgraphic{myfun-b::test-2}
     fill fullcircle scaled 1cm withcolor MyColor ;
\stopuseMPgraphic

\useMPgraphic{myfun-a::test-1}
\useMPgraphic{myfun-b::test-1}
\useMPgraphic{myfun-a::test-2}
\useMPgraphic{myfun-b::test-2}

\stoptext

however, during some cleanup stage something got lost ... so you need to 
fix this:

\unprotect

\def\meta_use_graphic#1#2%
   {\meta_begin_graphic_group{#1}%
    \doifsomething{#2}{\setupMPvariables[\currentMPgraphicname][#2]}%
    \getvalue{\??mpgraphic#1}%
    \meta_end_graphic_group}

\protect

there are few more places where

    \getvalue{\??mpgraphic ...

needs a #1 (I'll fix it).

So indeed you can have multiple independent instances. For instance we 
could have one for the chemical stuff which then cannot be messed up by 
other instances.

Hans


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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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