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I am trying to change the font and format of heading using titlesec package. However it gives me the following error.

Missing { inserted \tableofcontents <br>
Missing { inserted \chapter{Introduction} 

The code:

\documentclass[10pt, letterpaper]{report}

        {\normalfont\Large\centering\uppercase}{\chaptertitlename\ \thechapter}{0pt}{\Large}



Some text.

share|improve this question
Note that the renewal of your \chaptername doesn't have the correct format - only 2 arguments are required: \renewcommand{\chaptername}{CHAPTER}. The {\Large} has no meaning within the document preamble. – Werner Jun 7 '12 at 19:12
up vote 12 down vote accepted

\uppercase requires a parameter, which is not supported in this argument of \titleformat. But it's supported within another argument, that's why this works:

        {\normalfont\Large\centering}{\chaptertitlename\ \thechapter}{0pt}{\Large\uppercase}

The very last command in the last mandatory argument here can take an argument, which is the title text.


share|improve this answer
Thanks Stefan, Worked for me. – learner Jun 7 '12 at 19:13
Probably \MakeUppercase is better than \uppercase. If one wants to specify more complex management of the title, one can load titlesec with the explicit option and then it's required to specify the title with #1. – egreg Jun 7 '12 at 20:47

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