# Environment onehalfspacing error messages on compiling

In my document I've added the code onehalfspacing but everytime I compile I get the following error message:

Missing } inserted. }.

\documentclass[a4paper,12pt]{article}
\usepackage{color}
\usepackage{graphicx, epstopdf}
\usepackage{gensymb}
\usepackage{times}
\usepackage{tabulary}
\usepackage{tabularx}
\usepackage{longtable}
\usepackage{booktabs,caption, makecell}
\usepackage{pdflscape,afterpage,caption}
\usepackage[british]{babel}
\usepackage[backend=bibtex, citestyle=ieee, bibstyle=ieee]{biblatex}
\usepackage[section]{placeins}%Allows you to permanently fix figures.
\usepackage{titleps}%fancy page borders?
\usepackage[left=2.8cm, right=2.8cm, top=3.5cm, bottom=3.5cm]{geometry}
\usepackage{caption}
\captionsetup[figure]{font=scriptsize,labelfont=scriptsize}
\captionsetup[table]{font=scriptsize,labelfont=scriptsize}
\usepackage{microtype}
\usepackage{setspace}

\begin{document}
\begin{onehalfspacing}
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\end{onehalfspacing}
\end{document}


Grateful for any advice to fix this without making large scale changes to my document (it's a lage document and I'm paranoid there will be conflicting codes).

• Your code works for me out of the box. Is there a reason of loading caption three times?
– user31729
Feb 28, 2018 at 9:54

The setspace package defines

1. \onehalfspacing, a declaration, and

2. onehalfspace, an environment.

It's wrong using the former as if it were the latter. So use

\begin{onehalfspace}
...
\end{onehalfspace}


If you want that the whole document is typeset in “one and a half spacing”, put

\onehalfspacing


before \begin{document}.

• Thanks @egreg! Using '\onehalfspacing' resolved many of the error messages I was getting in the document. Strangeley it brought back all my 'undefined citations' even though the two issues seem unrelated. Feb 28, 2018 at 22:33
• for my future lazy self: here's the package to be used for copy and pasting rather than typing it out: \usepackage{setspace} May 27, 2021 at 8:03