Thank you for your response, John. 

Upon closer inspection, I think my initial assumptions were incorrect. I 
thought pandoc had found a command/environment that it didn't understand, 
but now it seems more obscure. 

I ran pandoc  with this command: "pandoc File.tex -t json --verbose" and 
got the following output

```
(lots of messages about Skipped and Parsing unescaped '&')
[INFO] Skipped '\bottomrule' at line 1849 column 16
[INFO] Skipped '\begin{tabular}' at line 1823 column 18
[INFO] Skipped '\end{tabular}' at line 1850 column 16
[INFO] Skipped '\subexperiment{SAP}' at line 1854 column 20

Error at "source" (line 1855, column 12):
unexpected [
Additional details are found in the following paragraphs.
           ^
```
The carrot should point to the d in details.

So I'm not sure why pandoc found what it thought was an "unexpected [". I 
couldn't find a bracket in the preceding few dozen lines, but I did find 
one in the few lines afterwards. Does the message mean something obscure?

Thanks for your help.
Jeremy

$ pandoc --version
pandoc 2.10
Compiled with pandoc-types 1.21, texmath 0.12.0.2, skylighting 0.8.5
Default user data directory: /Users/jlconlin/.local/share/pandoc or 
/Users/jlconlin/.pandoc
Copyright (C) 2006-2020 John MacFarlane
Web:  https://pandoc.org
This is free software; see the source for copying conditions.
There is no warranty, not even for merchantability or fitness
for a particular purpose.


On Thursday, September 10, 2020 at 6:50:28 PM UTC-6 John MacFarlane wrote:

>
> It really depends on the details of the document, but if
> pandoc is struggling with certain commands and environments,
> one approach is to define custom macros for those, which
> convert them into something pandoc can handle.
>
> (In a few cases you might get away with just putting the .sty
> file in the working directory, so pandoc tries to parse it,
> but pandoc usually can't handle the lower-level tex definitions
> style files have, so this usually doesn't work.)
>
> For example, if you have a foobar command, just
> add this to your document
>
> \renewcommand{foobar}[2]{limit yourself
> here to stuff pandoc can handle}
>
> You can often get pretty far with this method.
>
> Jeremy Conlin <jlco...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:
>
> > I have a large (900 page) LaTeX document (broken up into several LaTeX 
> > files) that I want to convert into restructured text. I've already tried 
> to 
> > use pandoc to convert some of the files and it has failed for a few 
> > reasons. 
> >
> > I'm a new pandoc user, but I figure I'm going to have to write my own 
> > converter. Before I do, I wanted to ask this forum what the right way to 
> > approach the conversion. I was planning on reading everything into 
> Python, 
> > do my own search/replace and then pass the result on to pandoc. I would 
> > then rinse/repeat until I have everything the way I want it. 
> >
> > I know there are filters and such that I can write to customize things, 
> but 
> > (as a beginner) I'm not sure if it would be easier to learn pandoc 
> syntax 
> > and write my own filter, or just go at it in Python as I described above.
> >
> > I don't mind doing it either way; I think it might be a fun side project 
> to 
> > do when I'm procrastinating doing what I really should be doing. 
> >
> > Please advise on what is the right approach. I'm sure there are other 
> > approaches too that I'm not aware of. I'm open for suggestions.
> >
> > Thanks,
> > Jeremy
> >
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