B.27 Runaway argument

There are a number of possible causes of this error:

Paragraph breaks are not permitted in the arguments of short commands . If there is a corresponding environment then you should use that instead. For example, this error message will be generated by doing, say,
\textbf{This is a simple document. Here is the first paragraph. ✘ Here is the second paragraph.}
instead of
\begin{bfseries} This is a simple document. Here is the first paragraph. ✔ Here is the second paragraph. \end{bfseries}
The closing brace of a mandatory argument is missing: This error will be caused by, say,
✘ \title{A Simple Document
instead of
✔ \title{A Simple Document}
This error can also be caused by omitting the mandatory argument of an environment . For example, this error will occur if you do, say,
✘ \begin{thebibliography} \bibitem{kopka95} A Guide to \LaTeXe
instead of
✔ \begin{thebibliography}{1} \bibitem{kopka95} A Guide to \LaTeXe

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