linguex in uclathes

Question

\exi. environment sends `undefined sequence' error. How can I fix it? Here is the code of the main tex file.

\documentclass [PhD] {uclathes}
\usepackage[normalem]{ulem}
\usepackage{linguex}


\begin {document}


\chapter{Introduction}

\exi. [BeP interesting [Be ] [PredP this book \sout{interesting}]]

\end {document}

Answer 1

The linguex package unfortunately still uses the old two letter font commands, and these would need to be defined by the class. The uclathes class correctly doesn't define them, (see Will two-letter font style commands (\bf , \it , …) ever be resurrected in LaTeX? for reasons why) so you need to provide them yourself.

\documentclass [PhD] {uclathes}
\usepackage[normalem]{ulem}
\usepackage{linguex}
\let\rm\rmfamily


\begin {document}


\chapter{Introduction}

\exi. [BeP interesting [Be ] [PredP this book \sout{interesting}]]

\end {document}