Math & Science ⇒ chemstyle | No '\unskip' in vertical mode

[BoudewijnD]

Hi,

I use the great chemstyle package while writing my thesis. I use it for numbering of my compound in the scheme's. However when I make a list of all the compounds I use in the chapter, (via \compound*{name}) and put this in the begin of a section (intro) than I get the following error for all the compounds listed.

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./chapter3.tex:16:You can't use '\unskip" in verticalmode \compound*{iodo-1-6-anhydro}

What am I doing wrong? I could not figure it out.

\BoudewijnD

[Stefan Kottwitz]

Hi BoudewijnD,

it would be good if you would post a minimal working example, so we could test and possibly fix that.

Stefan

[cgnieder]

The chemstyle package uses the chemcompounds package for the numbering. As you probably know the command \compound* only creates a label but doesn't print it. It uses \unskip so that no unwanted extra blank is created.

Since you didn't provide a MWE it's hard to say, what exactly you did wrong. You might try

Code: Select all

\leavevmode\compound*{<label>}

Or -- if you don't need the \schemeref command -- you could use the chemnum package.

[BoudewijnD]

It was a question of putting all the \compound* direct above the first section and no white spaces in between...

\BoudewijnD

[cgnieder]

As I said before: use \leavevmode

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\documentclass{article}
\usepackage{chemcompounds}
\begin{document}

\section{test A}

\leavevmode\compound*{a,b,c}
\section{test B}
Text \compound{a} more text \compound{b}.

\end{document}

EDIT: On the other hand you could just leave a blank line between \compound* and \section:

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\documentclass{article}
\usepackage{chemcompounds}
\begin{document}
\compound*{a,b,c}

\section{test A}
Text \compound{a} more text \compound{b}.

\end{document}

Regards

[DeminJanu]

Thanks for your reply Clemens.

In case any other websurfers else run into a different but similar problem:
I was using the pdfcomment package with MacTeX/TeX Live 2009. Upon switching computers and installing MacTeX/TeX Live 2011, I suddenly had the new, unexpected compilation error:

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! You can't use `\unskip' in vertical mode.
\\pdfcomment [#1]#2->\ifpc@opt@unskip \unskip 
                                              \fi \pc@copy@gopt@lopt \setkey...

No idea what this means, or what Clemens' solution is doing, but changing my \pdfcomment{} command to:

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\newcommand   {\note} [1]   {\leavevmode\pdfcomment{#1}}

(instead of just \pdfcomment{#1})

solved the problem. Again, i offer no insight as to what happened between TeX Live 2009 -> 2011, but it works, thanks!!!