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I am getting a strange error message when I put textbf into a frame environment.

Minimal Example



\textbf{Lemma 1}



Error Message:

! Missing number, treated as zero.
<to be read again>
l.8 \textbf
           {Lemma 1}

When I comment out the \textbf, the file compiles fine. When I use \textbf normally, the file also compiles fine.

Note: I am using pdflatex on Linux.

share|improve this question
It appears that it works fine with {\bf Lemma 1} instead, but that does not answer the original question. – merlin2011 Feb 7 '13 at 5:49
up vote 2 down vote accepted

I'm not sure whether you want to use beamer's frame environment, or LaTeX's \frame command (which I haven't even known before:). If the former is the case, you're not loading the beamer class! If the latter: \frame is a command, not an environment. It takes only one argument: in your case, this will be a lone \textbf --- thus the error.

Thus, either:



\frame{\textbf{Lemma 1}}

Or, the third framed:

% ... 
  \textbf{Lemma 1}
share|improve this answer
I was trying to use the one in package "framed". See my comment on A.Ellet's answer. – merlin2011 Feb 7 '13 at 6:15
Then the environment is called framed, not frame. – Sašo Živanović Feb 7 '13 at 6:21
It appears that framed does exactly what I was looking for. I was deceived by the slide. :) – merlin2011 Feb 7 '13 at 6:27

I'm not famliar with the frame environment. But the error seems to suggest that the frame environment takes some kind of argument and \textbf is getting slurped into that argument sans {Lemma 1}. This is why {\bf Lemma 1} appears to work.

Where did you run across \begin{frame}...\end{frame}?


\textbf{Lemma 1}



\textbf{Lemma 1}


\framebox{\textbf{Lemma 1}}


enter image description here

share|improve this answer
Slide 6 of this slide deck said to replace "shaded" with "frame" slideshare.net/linjaaho/how-to-make-boxed-text-with-latex – merlin2011 Feb 7 '13 at 6:12
Then this is a question about beamer and you want to use \documentclass{beamer} and not \documentclass{article} – A.Ellett Feb 7 '13 at 6:14
Changing the class as I suggested will circumvent your original error. – A.Ellett Feb 7 '13 at 6:14
Sorry, I totally missed the slide that said this presentation is about Beamer. I'm trying to write boxed text in a document, not a slideshow. – merlin2011 Feb 7 '13 at 6:28
I upvote this answer because it provides a lot of useful information, but accepted the other one because it answered my intended question. – merlin2011 Feb 7 '13 at 6:29

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