Latex error: extra alignment tab has been changed to \cr

Question

I am using ACM SIG template and trying to create a table of 4 columns.

I get the error mentioned in the title of the question. I know the standard reasons why this error can occur.

But my question is:- Is it possible that the template or .cls file is controlling the maximum number of columns in a table ? It it were, would I get a different error than this ?

Answer 1

Try asking your question at http://tex.stackexchange.com -- you're likely to get more page views there.

Answer 2

The error can be reproduced by

\documentclass{article}

\begin{document}

\begin{tabular}{c|c}
one & two & three \\
\hline
one & two 
\end{tabular}
\end{document}

The problem is caused by the extra column you try to insert. The tabular environment expects two columns but three is inserted.