# glossaries error with *4col styles

I wanted to print out a nomenclature with symbols (i.e. VARIABLE - DEFINITION - SYMBOL form). Below is the MWE

\documentclass[11pt,onecolumn,draft,a4paper]{book}
\usepackage{longtable}
\usepackage{makeidx}
\usepackage[acronym, toc, section, shortcuts, nopostdot, nogroupskip]{glossaries}
\usepackage{glossary-long}
\newglossary[slg]{symbols}{syi}{syg}{Nomenclature}
\newglossary[ilg]{indices}{iyi}{iyg}{List of indices}
\makeglossaries

\newacronym{ECD}{ECD}{equivalent circuit diagram}
\newacronym{RES}{RES}{renewable energy source}
\newglossaryentry{Rx1}
{
name={\ensuremath{R_{x1}}},
description={Equivalent series resistance},
symbol={\ensuremath{\Ohm}},
sort=Rx1, type=symbols
}
\newglossaryentry{ref}
{
name={*},
description={Indicates reference value},
sort=ref, type=indices
}

\begin{document}
\printglossary[type=\acronymtype, style=long, title=List of Abbreviations and Acronyms]
\vspace{40pt}
\printglossary[type=symbols, style=long4col, title=Nomenclature]
\vspace{40pt}
\printglossary[type=indices, style=long, title=List of indices]
\end{document}


The error is:

! Undefined control sequence.
<argument> \Ohm
l.5 ...etentrycounter[]{page}\glsnumberformat{1}}}
%
The control sequence at the end of the top line
of your error message was never \def'ed... BLA-BLA-BLA


It occurs only with 4cols styles one of which I need for printing out the symbols column. I also totally don't understand the error. Btw, it doen't occur with *3col styles.

• You need to load a package that defines \Ohm. The reason the 3cols styles don't produce an error is because they don't try to use the symbol. – Nicola Talbot Dec 19 '13 at 23:14
• @NicolaTalbot OMG, thanks a lot. I'd even like to delete this question, but let it be. Actually, I tried to change the glossary style yesterday late evening, that's why so stupid mistakes. – Omicron_Persei_11 Dec 20 '13 at 14:58
• Don't worry about it. The siunitx and gensymb packages both provide \ohm and textcomp provides \textohm if that's of any help. – Nicola Talbot Dec 20 '13 at 15:10