Loading microtype before gregoriotex breaks metapost-based features.

[lpburrows]

I keep getting an error when trying to set braces in Gregorio 5.0.2 on TexShop 3.77 on Mac. The error reads:

"Undefined control sequence.
l.5 \mplibtoPDF
{
l.468 \GreSyllable
{\GreSetThisSyllable{}{}{}{}{}}{}{\GreUnstyled}{1}{\GreSetNe…”

My gabc file has (jr[ocba:1{] ih[ocba:0}]), but it does it at any place braces are coded. Any ideas?

[henryso]

Please run the system-setup.command and provide the output.

[lpburrows]

Sorry about that.

system-setup.txt

[henryso]

When you installed TeX Live, did you perform a full installation? It seems like some metapost-related commands are unavailable.

[lpburrows]

I did a full installation, yes. And I just uninstalled MacTeX 2017 and did a fresh installation, and still have the same issue.

[henryso]

Ok, I'm puzzled as to why it's not working. Perhaps our resident Mac expert can help you. @rpspringuel?

[lpburrows]

A minimal example and then trial and error commenting out packages revealed that microtype was the culprit.

[henryso]

@lpburrows Do you mind sharing the MWE? I tried a trivial example with microtype and that error didn't happen.

[lpburrows]

@henryso Here's one with both functional and nonfunctional options, for comparison.

% !TEX program = LuaLaTeX+se
% !TEX encoding = UTF-8 Unicode
\documentclass[a5paper,9pt,english-us]{book}
\usepackage{microtype}
\usepackage[autocompile]{gregoriotex}
\begin{document}
\gabcsnippet{(c4) (f) (gh) (h) (h) (h) (ixir1) (hr) (h) (gr1) (hr) (h.) (:)
%(h) (h) /(h) (g) (f) (gr) (gf) (d.) (::)} %functional
(h) (h) /(h) (g) (f) (gr[ocba:1{]) (gf[ocba:0}]) (d.) (::)} %nonfunctional
\end{document}

[henryso]

Ok. Load microtype after gregoriotex.

[rpspringuel]

If it's just a package loading order question, then I think that we can just document the required order. There are plenty of other packages that care about their loading order with respect to other packages.

[henryso]

How best to document this?

[rpspringuel]

IIRC we had a blurb in the package loading section about a package conflict before. That conflict got solved, so the blurb was removed, but I think it's a suitable model for how to document this sort of thing. You might try searching through the history of the documentation folder to find what I'm referring to (as my memory isn't up to remembering any more specifics than this).

[henryso]

I can't find the revision with the blurb. Do you know which package had a conflict so I can search for something rather than paging through hundreds of commits?

[rpspringuel]

fontspec: see be4c9f3