2011 June 29
Another random computer fix. I was trying to compile a document with
pdflatex, and was getting:
LaTeX Error: Command \url already defined.
My document used the
hyperref package, and disabling this did make the
problem go away. But I could compile the document on another machine without
It turned out that the culprit was the
latex2html package. The
package requires a package called
url.sty, which normally has some special
hooks that are invoked when
hyperref (and perhaps
pdflatex) are active.
latex2html comes with an old version of
url.sty that doesn’t have
these hooks, and on my machine LaTeX prefers the version that comes with
latexhtml (in the
tex/latex/html/ subdirectory of the
texmf tree) to the
usual version (in
latex2html solved the problem. Of course, now I don’t have
latex2html, but I don’t need it at the moment.