Re: mplib

["Wolfgang Werners-Lucchini" <wwl@musensturm.de>]

On 12 Apr 2008 at 9:39, ntg-context-request@ntg.nl wrote:

> > \startlua
> > mp = mplib.new ( {
> >     hash_size = 100000,
> >     main_memory = 2000000,
> >     param_size = 100000,
> > } )
> > 
> > if mp then
> >     res = mp:execute(
> > "beginfig(1) draw (0,0) .. (1,1) .. (2,1); endfig; bye;" )
> >     tex.print("[" .. tostring(res.status) .. "]")
> >     mp:finish()
> > end
> > \stoplua
> 
> no format, so beginfig, draw etc are unknown

I thought 'plain.mem' is the default. But I see, there exists only 
'metafun.mem'.

So I  wrote:
------------------------------------------------------
mp = mplib.new ( {
    hash_size = 100000,
    main_memory = 2000000,
    param_size = 100000,
    mem_name = "metafun.mem"
} )
------------------------------------------------------
and it get the same result

> metapost.process("metafun","some commands")
> 
> may work better
------------------------------------------------------
\startlua
mp = mplib.new ( {
    hash_size = 100000,
    main_memory = 2000000,
    param_size = 100000
} )

if mp then
    res = metapost.process("metafun","beginfig(1) draw (0,0) .. (1,1) 
.. (2,1); endfig; bye;")
    tex.print("[" .. tostring(res.status) .. "]")
    mp:finish()
end
\stoplua
------------------------------------------------------

results in :

------------------------------------------------------
mplib          : loading format: metafun.mp, name: 
d:/context/tex/texmf-cache/luatex-
cache/context/c80dc1fd5292ec817c6e82c295beaf1e/formats/cont-en-
metafun.mem
! Emergency stop.
\@@expanded ..... "]")
--     mp:finish()
-- end
}
                                                  
l.54 \stoplua
             
!  ==> Fatal error occurred, no output PDF file produced!
------------------------------------------------------

why does it load 'metafun.mp'?


after that I tried

------------------------------------------------------
\startlua
mp = mplib.new ( {
    hash_size = 100000,
    main_memory = 2000000,
    param_size = 100000,
    mem_name = "metafun.mem"
} )

if mp then
    res = metapost.process(mp,
         "beginfig(1) draw (0,0) .. (1,1) .. (2,1); endfig; bye;")
    tex.print("[" .. tostring(res.status) .. "]")
    mp:finish()
end
\stoplua
------------------------------------------------------

which gives the following error:

------------------------------------------------------
report >> error: This is MetaPost, Version 1.003 (Cweb version 0.40)

I can't find the PLAIN mem file!
------------------------------------------------------


What else should I check to find the error?

Wolfgang
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