"misplaced \omit" error when >{\centering} columns

Question

First of all, I have looked at every other misplaced \omit... error question about tables I have found on this site and none of them quite relate to my situation. This is the closest I could find, but it does not quite fit my application the solution relates to using \tabularnewline vs \\ in cells which I am not using.

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I am attempting to make a table which looks almost like this:

The above example was generated from the following.

\documentclass{article}
\usepackage{array}

\begin{document}
\begin{table}
\begin{tabular}{m{1in}m{1in}m{1in}}
\cline{1-1}
\multicolumn{1}{|m{1in}|}{\textbf{Caption}} & cell of muliline text to wrap & cell of muliline text to wrap \\ \cline{1-2}
\multicolumn{1}{m{1in}|}{cell of muliline text to wrap} & \multicolumn{1}{m{1in}|}{\textbf{Caption}} & cell of muliline text to wrap \\ \cline{2-3} 
cell of muliline text to wrap & \multicolumn{1}{m{1in}|}{cell of muliline text to wrap} & \multicolumn{1}{m{1in}|}{\textbf{Caption}} \\ \cline{3-3} 
\end{tabular}
\end{table}
\end{document}

However, I would like the columns to be centered instead of justified. I would normally do this by replacing all instances of m{1in} with >{\centering}m{1in}. But when I do this I get the following error.

! misplaced \omit.\@cline #1-#2\@nil -> ...

How do I reproduce the above table format but with centered columns?

Answer 1

\documentclass{article}
\usepackage{array}

\begin{document}
\begin{table}
\begin{tabular}{*{3}{>{\centering\arraybackslash}m{1in}}}
\cline{1-1}
\multicolumn{1}{|m{1in}|}{\textbf{Caption}} & cell of muliline text to wrap & cell of muliline text to wrap \\ \cline{1-2}
\multicolumn{1}{m{1in}|}{cell of muliline text to wrap} & \multicolumn{1}{m{1in}|}{\textbf{Caption}} & cell of muliline text to wrap \\ \cline{2-3} 
cell of muliline text to wrap & \multicolumn{1}{m{1in}|}{cell of muliline text to wrap} & \multicolumn{1}{m{1in}|}{\textbf{Caption}} \\ \cline{3-3} 
\end{tabular}
\end{table}
\end{document}

within the scope of \centering, \\ is redefined to make a centred forced line break, so no longer has its "end table row" definition. You can either use \arraybackslash to re-assert the table definition of \\ or you could use \tabularnewline instead of \\ which is a longer form provided that always refers to the end of table row.