packagessymbolsunicode
In my *.cls class file I loaded
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
(does the order of the two matter?)
and get the following error message: Command \texteuro unavailable in encoding T1.
eurosym?A solution that integrates cgnieder's and rdhs's:
\documentclass[letterpaper,12pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{mathptmx}
\usepackage{tgtermes,chemmacros}
\usepackage[artemisia]{textgreek}
\usepackage{newunicodechar}
\ExplSyntaxOn
\cs_new_protected:Npn \IfInIupac #1 #2
{ \bool_if:NTF \l_chemmacros_inside_iupac_bool {#1} {#2} }
\ExplSyntaxOff
\newunicodechar{β}{\IfInIupac{\Chembeta}{\ensuremath{\beta}}}
\newunicodechar{ᴅ}{\IfInIupac{\D}{\textsc{d}}}
\begin{document}
\iupac{isopropyl-1-thio-β-ᴅ-galactopyranoside}
\end{document}
Other equivalences can be defined similarly. If the upright beta is needed also in text, the best way is, in my opinion, not to use it in math at all and change the definition into
\newunicodechar{β}{\Chembeta}
Apologies in advance; This answer is unfortunately all shell and no TeX.
It seems that you are running some form of *NIX, so you could try and see what the encoding of the file is with
file file.tex
Chances are that the file is in one of the ISO-8859-* encodings, and if so, the file command, AFAIK, cannot tell which part of the standard it is. After consulting the previously linked wikipedia page, you can make a guess (and appreciate Unicode even more).
If you would like to convert the encoding to UTF-8, you could use
iconv --from-code=ISO-8859-n --to-code=UTF-8 file.tex > file-utf8.tex
where n could be 1 or 15, for example. The input conversion is printed to standard output, so the > redirection tells to redirect to a file file-utf8.tex instead.
Best Answer
Some fonts do not have euro symbol. To allow TeX to construct a fake one for this case, just add the line
or, in a
.clsfile