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I am new to Latex so I would like to ask you for some help, I was provided with a predefined class file (.cls) to fulfill the format requirements for my undergraduate thesis book and now I am trying to adapt a similar structure for my master thesis book.

The cls file without any modification is properly working in the Lyx environment for Latex. But once I slightly modify the cls file using the Notepad text editor, then the document doesn´t compile in LyX.

My question is how should I edit the contents of the class file, so it allows the document to be compiled? Do I need to compile the class file in a Tex editor? is it texWorks a good option?

I would appreciate your comments! Thank you in advance

closed as unclear what you're asking by user31729, TeXnician, Schweinebacke, Stefan Pinnow, user36296 Sep 7 '17 at 10:57

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  • This has also been asked on the LyX mailing list. – Johannes_B Mar 31 '17 at 14:16
  • Welcome to TeX.SX! What kind of modifications are done? What is the error message reported by TeX? – Heiko Oberdiek Mar 31 '17 at 14:19
  • The reported error is \document{begin} is missing. In some parts of the code I just want to change part of the text to be shown \NeedsTeXFormat{LaTeX2e}[1995/12/01] \ProvidesClass{tesisusb} [2004/08/06 v1 clase para LaTeX consistente con el formato del Decanato de Postgrado USB] .... \begin{center}% \includegraphics[scale=.4]{cebolla}\\ \large{UNIVERSIDAD SIM\'ON BOL\'IVAR}\\ .... In this example, I only changed the part \large{UNIVERSIDAD SIM\'ON BOL\'IVAR}\\ replaced with \large{X UNIVERSITY}\\ – Adrian Mar 31 '17 at 14:33
  • Try this: Start from the fresh (working) original cls file. DO NOT EDIT IT IN NOTEPAD. Instead, get the free Notepad++ editor for Windows (it is also Portable). Edit it using that, being sure that you have it set to retain the original encoding and line endings. That might or might not help, but it is a good guess. – user103221 Mar 31 '17 at 14:33
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    Editing a cls file is not for those new to LaTeX. Are you really sure that's the best way to do it? What are you trying to do? – Teepeemm Mar 31 '17 at 14:34