Beamer document: Undefined control sequence

Rich Shepard rshepard at
Fri Apr 10 15:18:07 UTC 2020

I copied a .lyx beamer class file to a new name and am modifying the copy
for a different presentation. (I did this because I like the layout in the
original and copying is a quick way to get that in the new document.)

However, when I compile it (pdflatex) using Ctrl-h an error box displays an
undefined control sequence in \makebeamertitle only the copied file, not the
original. Yet, the .pdf file is produced and displays. A mwe.lyx is

While I close the error box and go on, I'd like to understand what broke in
the copy so I can fix it.

I hope you're all healthy -- and stay that way -- and coping with the
pandemic and economic disruptions.


-------------- next part --------------
#LyX 2.3 created this file. For more info see
\lyxformat 544
\save_transient_properties true
\origin unavailable
\textclass beamer


\use_default_options false
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
\font_roman "palatino" "default"
\font_sans "default" "default"
\font_typewriter "default" "default"
\font_math "auto" "auto"
\font_default_family default
\use_non_tex_fonts false
\font_sc false
\font_osf false
\font_sf_scale 100 100
\font_tt_scale 100 100
\use_microtype false
\use_dash_ligatures true
\graphics default
\default_output_format default
\output_sync 0
\bibtex_command default
\index_command default
\paperfontsize default
\spacing single
\use_hyperref false
\papersize default
\use_geometry false
\use_package amsmath 1
\use_package amssymb 1
\use_package cancel 1
\use_package esint 0
\use_package mathdots 0
\use_package mathtools 1
\use_package mhchem 0
\use_package stackrel 1
\use_package stmaryrd 1
\use_package undertilde 1
\cite_engine basic
\cite_engine_type default
\biblio_style plain
\use_bibtopic false
\use_indices false
\paperorientation portrait
\suppress_date false
\justification true
\use_refstyle 0
\use_minted 0
\index Index
\shortcut idx
\color #008000
\secnumdepth 2
\tocdepth 2
\paragraph_separation skip
\defskip medskip
\is_math_indent 0
\math_numbering_side default
\quotes_style english
\dynamic_quotes 0
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict false


\begin_layout Title

\begin_layout Subtitle

\begin_layout Author

\size small
\begin_inset Argument 1
status collapsed

\begin_layout Plain Layout
Rich Shepard


Richard B.
 Shepard, Ph.D.
\begin_inset Newline newline

Applied Ecosystem Services, LLC.
\begin_inset Newline newline

\size scriptsize
\begin_inset ERT
status collapsed

\begin_layout Plain Layout



\noun on
Applied Ecosystem Services, LLC
\noun default

\begin_layout Standard
\begin_inset ERT
status open

\begin_layout Plain Layout




\begin_layout Section*


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