Thanks for caring ... as I see in the posts, the problem is not Windows 
exclusive.
For me the solution with temporary updating the path, is enough. 
It seems, i can't help anymore, because the parameter --trace, 
--log=file.log, --verbose didn't seem to work for me (at least in my 
batch-file), so i can't provide any more information. :(

Thanks for this incredible piece of software.

Am Donnerstag, 4. Januar 2018 17:27:27 UTC+1 schrieb John MacFarlane:
>
> I'm not sure why there'd be a difference btw pandoc 1 and 2. 
> I've looked at the code and nothing is jumping out at me. 
>
> +++ 'K' via pandoc-discuss [Jan 03 18 23:29 ]: 
> >   Thanks for your response. 
> >   Because of using it in a batch-file I could temporary change the 
> >   path-variable without a problem and after that it runs smoothly. 
> >   Is pandoc 2 searching for ( / needing) supporting-files from miktex / 
> >   pdflatex? (and version 1.x doesn't do that?) 
> >   But that workaround is good enough for me. 
> >   Thanks for your quick help. 
> >   Am Mittwoch, 3. Januar 2018 19:42:23 UTC+1 schrieb John MacFarlane: 
> > 
> >     Generally this would happen if the program is not found 
> >     when pandoc tries to run the process. I'm not sure why that 
> >     would be. 
> >     Try just using --pdf-engine=pdflatex and putting the 
> >     relevant directory in your path (perhaps temporarily). 
> >     +++ 'K' via pandoc-discuss [Jan 03 18 04:03 ]: 
> >     >   Hi, 
> >     >   I'm using portable Versions of pandoc and miktex on a Windows 
> >     System. 
> >     >   With pandoc 1.19.2.1 converting a markdown-File to PDF runs fine 
> >     - the 
> >     >   used commandline looks like this: 
> >     >   D:\pandoc\pandoc_1.19.2.1\pandoc.exe -o docs\file.pdf 
> >     >   --latex-engine=D:\LaTeX\MiKTeX_2.9\miktex\bin\pdflatex.exe --toc 
> >     >   docs\[1]file.md 
> >     >   After upgrading pandoc to 2.0.6 I have to change the parameter 
> >     >   --latex-engine to --pdf-engine. The new commandline that would 
> >     be used 
> >     >   was this: 
> >     >   D:\pandoc\pandoc_2.0.6\pandoc.exe -o docs\file.pdf 
> >     >   --pdf-engine=D:\LaTeX\MiKTeX_2.9\miktex\bin\pdflatex.exe --toc 
> >     >   docs\[2]file.md 
> >     >   Following is the response I get: 
> >     >   pdf-engine D:\LaTeX\MiKTeX_2.9\miktex\bin\pdflatex.exe not known 
> >     >   I have updated Miktex, but the result is the same. With 1.19.2.1 
> >     the 
> >     >   PDF will be created. 
> >     >   Thanks for any helpfull advice. 
> >     >   Greetings 
> >     >   Karsten 
> >     > 
>
>

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