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I'm trying to use titlesec with LyX 2.2.2. When I add this line:

 \usepackage{titlesec}

to my LaTeX preamble then run LaTeX I get this error:

Missing \endgroup inserted.

followed by complaints about missing }'s

The document class is Report (Standard class) and I have nothing selected in the Modules pane of the LyX settings. The preamble consists of just \usepackage{titlesec} and the entire document is just a title and a table. The error occurs only if \usepackage{titlesec} is in the preamble. Screenshots of the complete document, the preamble in Settings, and the error message follow. Document window LaTeX preamble enter image description here

  • Can you add a complete preamble (MWE), please? – Sebastiano Mar 20 '17 at 8:07
  • Load titlesec per se cannot produce any error in a simple article like \section{xx} foo so you must show what your are doing wrong. The way to do this is make a minimal working example (MWE). – Fran Mar 20 '17 at 8:12
  • I've updated the question with details of the minimal example to reproduce the error. – Clyde Mar 20 '17 at 22:23
  • @Clyde please add a minimal example .lyx file. Please read this LyX-specific page for an MWE. – scottkosty Mar 20 '17 at 23:26
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Obviously there's more than what you described. Your caption is in Paragraph* formatting. Check what's in View>Source. The relevant part should read

\begin{table}
\caption{Column} 
\end{table}

not

\begin{table}
\paragraph*{\protect\caption{Column}}
\end{table}
  • Ok, thanks. When I originally added the table it was in Paragraph formatting, no idea why, that's just what LyX did. I changed it to Paragraph* but that had no effect. The error message didn't exactly point me in the right direction. – Clyde Mar 23 '17 at 2:01
  • Everything within the float:Table should be in "Plain Layout". I wonder why you ever had it as Paragraph. – PhilipPirrip Mar 23 '17 at 2:11

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