# Error: extra alignment tab has been changed to \cr

I am using the 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 ? If it were, would I get a different error than this?

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## migrated from stackoverflow.comDec 4 '11 at 18:46

This question came from our site for professional and enthusiast programmers.

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.

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that's precisely what was happening. in TexShop on mac, the characters for | and l look exactly same. –  euphoria83 Oct 18 '10 at 19:46

\documentclass{article}