[Tex/LaTex] Appendix letter missing

appendices

I am writing documents using apa6.
I don't get an Appendix letter but figures and tables are labeled with and appendix letter prefix. I cannot find the problem.

Here is the code I use. 

\documentclass[11pt,doc]{apa6} 
\DeclareGraphicsRule{.tif}{png}{.png}{`convert #1 `dirname #1`/`basename #1 .tif`.png}
\usepackage[usenames,dvipsnames]{xcolor, colortbl}
\usepackage{soul}
\usepackage[dutch]{babel} 
\usepackage[utf8]{inputenc}
\usepackage{csquotes}
\usepackage{amsmath}
\usepackage{nameref}

\usepackage{setspace}  
\usepackage[inline]{enumitem}
\usepackage[normalem]{ulem} 
\usepackage{array} 
\usepackage{multirow}
\usepackage{lscape}
\usepackage{pdflscape} 
\usepackage{fancyhdr}
\usepackage{setspace}
\usepackage[dutch]{varioref} 


\usepackage[style=apa,sortcites=true,sorting=nyt,backend=biber]{biblatex}
\DeclareLanguageMapping{dutch}{dutch-apa}

\definecolor{Gray}{gray}{0.90} 
\definecolor{C_TableRow}{gray}{0.90} 
\definecolor{C_TableTop}{rgb}{1,1,0.8} 


 % command for cell alignment in tables
\newcolumntype{L}[1]{>{\raggedright\let\newline\\\arraybackslash\hspace{0pt}}p{#1}} % p aligns to top; m towards center and b to the bottom
\newcolumntype{C}[1]{>{\centering\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{R}[1]{>{\raggedleft\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}

% element counter that I use in tables
\newcounter{item-nr} \setcounter{item-nr}{0}
\newcommand{\nextItem}{\stepcounter{item-nr}\arabic{item-nr}}
 \newcommand{\firstItem}{\setcounter{item-nr}{1}\arabic{item-nr}}

\title{Design}
\shorttitle{ Instruction Design}
\author{John Whatever}
\affiliation{
\vfill
\footnotesize{Onderwijs}
}


\abstract{ Samenvatting abstract}


\keywords{Design of Instruction, Instruction Design}



\begin{document}
\maketitle

\section {Start of ducument}
Dit is de inhoud van het document


\printbibliography

\appendix

\section{\textbf{Section with first attachement}}
The reference to the Table \vref{tab:tab1} shows there is an Appendix letter.

\begin{table}[h]
\renewcommand{\arraystretch}{1.3}
\begin{threeparttable}
\centering
\caption{ Table in Appendix } \label{tab:tab1}
\begin{tabular}{R{1.5cm} L{12cm} R{1cm}}
\hline
\rowcolor{C_TableTop}
\small{Req nr.} & \textbf{Element description }& \textbf{some id} \\
\hline
R\firstItem& Element 1&1\\

R\nextItem &  Element 2 & 1.1\\

\hline
\end{tabular}
\end{threeparttable}
\end {table}


\end{document}

Any suggestion is welcome to get the appendix letter in place.

Best Answer

The apa6 class adds letters to the section titles in the appendix only if there's more than one section.

You get the letter nonetheless if you do

\global\oneappendixfalse
\appendix

so as to override the standard mechanism in apa6.cls.

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