%% test-errors.tex
%% ===============
%% The errors of tblnotes.  Run with -interaction=nonstopmode and
%% select the case by \CASE:
%%
%%   pdflatex -interaction=nonstopmode -jobname=test-errors-tpt-before \
%%     "\def\CASE{tpt-before}\input test-errors"
%%
%% Cases and the error message to find in the log:
%%   tpt-before   threeparttable loaded before tblnotes
%%   tpt-after    threeparttable loaded after tblnotes
%%   tptx-after   threeparttablex (which loads threeparttable) after
%%   tfn-before   tablefootnote loaded before tblnotes
%%   tfn-after    tablefootnote loaded after tblnotes
%%                "Package '<package>' cannot be used with tblnotes."
%%   counter      counter=<undefined counter>:
%%                "Counter 'nosuchcounter' is not defined."
\ifdefined\CASE\else\def\CASE{tpt-before}\fi
\documentclass{article}
\def\TNcase#1{\def\TNtmp{#1}\ifx\TNtmp\CASE}
\TNcase{tpt-before}\usepackage{threeparttable}\fi
\TNcase{tfn-before}\usepackage{tablefootnote}\fi
\usepackage{tblnotes}
\TNcase{tpt-after}\usepackage{threeparttable}\fi
\TNcase{tptx-after}\usepackage{threeparttablex}\fi
\TNcase{tfn-after}\usepackage{tablefootnote}\fi
\begin{document}
\TNcase{counter}\tblnotessetup{counter=nosuchcounter}\fi
\begin{tabular}{l}
A\footnote{A note.} \\
\end{tabular}
\end{document}