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Latest news 2019-11-04: The giveaway of two signed copies of “Quack, quack, quack. Give my hat back!” has closed and the winning entrants have been selected. Thank you to everyone who took part.

B.25 Missing number, treated as zero

LaTeX is expecting a number. If your command takes more than one argument, check to make sure the arguments are in the correct order. For example, if you are using a minipage environment, you might have omitted the mandatory argument which specifies the width of the minipage, or you may have the optional arguments the wrong way round. The placement specifier should come first, followed by the height.

If you are using \addtocounter or \setcounter remember that the second argument must be a number, so if you want the value of a counter as the argument you must use \value. This error can be caused by, say,


\setcounter{exercise}{chapter}
instead of

\setcounter{exercise}{\value{chapter}}


This book is also available as A4 PDF or 12.8cm x 9.6cm PDF or paperback (ISBN 978-1-909440-00-5).

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