FatalMath Mode
Extra Alignment Tab in Table or Array
! Extra alignment tab has been changed to \cr.
What this error means
A row in a tabular, array, or align environment contains more & column separators than the column specification allows. LaTeX forces a row break at the extra &.
Common causes
- More & characters than columns defined in the column spec
- Missing column in the \begin{tabular}{...} definition
- Accidentally adding an extra & at the end of a row
How to fix it
Count the & characters in each row and ensure they match the number of columns minus one. For a 3-column table you need exactly 2 & per row. Update the column specification if you added a new column.
Code examples
Causes the error
\documentclass{article}
\begin{document}
\begin{tabular}{ll} % 2 columns = 1 ampersand per row
Name & Age & City \\ % 3 columns worth of data!
Alice & 30 & Paris \\
\end{tabular}
\end{document}Fixed
\documentclass{article}
\begin{document}
\begin{tabular}{lll} % 3 columns = 2 ampersands per row
Name & Age & City \\
Alice & 30 & Paris \\
\end{tabular}
\end{document}Related errors
Test the fix live
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