Writing a book class for LaTeX2e, \NeedsTexFormat{LaTeX2e} "not defined" error?

Question

I have a book class titled epbook.cls with the following opening lines

\NeedsTexFormat{LaTeX2e}%
\ProvidesClass{epbook}[2015/11/21 The EmptyPotato Press Book Class]%
\LoadClass{book}%
\RequirePackage{titlesec}%

[redefinition of \section, \subsection, and \sub-subsection]

and a test-epbook.tex with

\documentclass{epbook}%

\begin{document}%
\part{The Standards}%
\chapter{K. Kindergarten}
\domain{CC. Counting and Cardinality}
\cluster{[A.]}
\paragraph{[text of cluster A]}
\standard{K.CC.A.1}
\paragraph{[text of standard 1]}
[etc.]

\end{document}%

At this point, I am only attempting to modify the section, subsection, and sub-subsection headers. Section is replaced with Domain, subsection with Cluster, and sub-subsection with Standard. When I compile the .tex file (using TeXnicCenter; LaTeX -> PDF) I get an error message saying that;

\NeedsTexFormat{LaTeX2e}% is an undefined control sequence.

Does anyone see an error in this class file?

Since this is a typo, i think this question should be closed. — Johannes_B, Nov 22 '15 at 08:33
I'm voting to close this question as off-topic because it's about a wrongly typed command — egreg, Nov 22 '15 at 11:27

Werner · Answer 1 · 2015-11-22T07:03:02.277

7

You need to use

\NeedsTeXFormat{LaTeX2e}[1995/12/01]

Note that it's spelt TeX, not Tex. Also, the optional argument at the end is, well, optional.

edited Nov 22 '15 at 07:03

answered Nov 22 '15 at 06:31

Werner

603,163

Perfect. Works like a charm with that correction. – Mark Russell Nov 22 '15 at 06:47

Writing a book class for LaTeX2e, \NeedsTexFormat{LaTeX2e} "not defined" error?

1 Answers1