TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

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

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.