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I am trying to migrate documents to http://latexlab.org, but they won't compile because they require expl3.sty. Yesterday I started by uploading all of the expl3 sty files but then latex demanded even more.

I would be happy to do without expl3, but I can't determine what packages are calling it.

note: While writing this message, I realized that the xfrac package (see siunitx) was the culprit.

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I'd answer my own question in such a case. – Charles Stewart Nov 12 '10 at 22:24
Same here: there is nothing wrong with asking a question and answering it yourself – Joseph Wright♦ Nov 12 '10 at 22:33
done. Thanks for the advice. – David Nov 12 '10 at 22:36

3 Answers

up vote 5 down vote accepted

There was a discussion of that on the LaTeX-L mailing list recently. A script was provided there to find all packages with direct or indirect dependency on expl3.

Bundles: expl3, xpackages, gmutils, and the following packages:

./gmverb/gmverb.sty
./notes2bib/notes2bib.sty
./unicode-math/unicode-math.sty
./libertine/libertine.sty
./randomwalk/randomwalk.sty
./libertine/libertinekey.sty
./tucv/tucv.sty
./xltxtra/xltxtra.sty
./libertine/libertinelist.sty
./metalogo/metalogo.sty
./gmdoc/gmdoc.sty
./siunitx/siunitx.sty
./libertine/libertinelogo.sty
./realscripts/realscripts.sty
./circuitikz/circuitikz.sty
./chemstyle/chemstyle.sty
./fontspec/fontspec.sty
./mh/xfrac.sty
./mh/flexisym.sty
./gmdoc-enhance/gmdoc-enhance.sty
./mh/breqn.sty
./libertine/libertinecomp.sty

Search for messages from ~Feb. 25, 2011 on the latex3 mailing list.

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2  
That link goes to a login page. – Caramdir Mar 8 '11 at 23:21
@Caramdir: thank you. I fixed it by putting the list explicitly (that's better anyways). – Bruno Le Floch Mar 9 '11 at 1:03
1  
Easier access is via news.gmane.org/group/gmane.comp.tex.latex.latex3 – Joseph Wright♦ Mar 9 '11 at 8:01
@Joseph: thank you for the corrected link. I made my answer CW, because it does not seem fair to get more rep' from someone else's script. – Bruno Le Floch Mar 9 '11 at 8:24
It's fair since it was you who found the appropriate script. – Hendrik Vogt Mar 9 '11 at 10:07
up vote 1 down vote

Doing a small texdoc expl3 will tell you that this package introduces syntax for LaTeX3 programming.

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up vote 5 down vote

By individually commenting out packages and recompiling, I found that the xfrac package (see siunitx) was the culprit.

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The name of the package is xfrac (it only defines the \sfrac command). – lockstep Nov 12 '10 at 22:40
David: And since your problem is resolved, you can accept your own answer. – Charles Stewart Nov 13 '10 at 8:58
thanks for the tip, but it says I have to wait until tomorrow – David Nov 13 '10 at 22:00
My question is more general than the answer that I provide; e.g. it is still not clear to me how I can tell, generally, which packages depend on expl3. I would change the selected answer to one that answers this. – David Nov 13 '10 at 22:54

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