Error reporting

[yuhuangniu]

When I run mtpro2-patch.tex in latest Texlive2022, error reports that:
Undefined control sequence. \curlybraces
Then I come back to mtpro2-patch.tex and delete
\newcommand*\@ifcurlybraces{% \expandafter\ifx\csname lbrace \endcsname\lbrace \expandafter\@firstoftwo \else \expandafter\@secondoftwo \fi } \else
from line 350 to 357, then everything works fine.

[RuixiZhang42]

@yuhuangniu I did not get any notifications when you opened this issue. Weird…

In any case, this error message

Undefined control sequence. \curlybraces

is unlikely caused by mtpro2-patch.tex.

The command \curlybraces is defined by the official mtpro2 package. Be sure to load the package before the patch:

font-pairing-guide/mtpro2-patch.tex

Lines 4 to 10 in 6cf43b6

	% The standard usage is:
	%
	% \usepackage[<options>]{mtpro2}
	% \newcommand*\mtpscale{0.910}
	% \newcommand*\mtpscriptscale{0.847}
	% \newcommand*\mtpscriptscriptscale{0.794}
	% \input{mtpro2-patch}

Since mtpro2 is a commercial package (even the “Lite” version, which is free, comes with a proprietary license), I suspect that TeX Live cannot distribute/ship it (legally speaking). Maybe this is the reason for the error message?