[R] beamer error with R

[Mario Alfonso Morales Rivera]

Dear R users,

When I use beamer with \usepackage{harvard} it don't work.

\LaTeX{} give mi an error message, ¿any suggestion?

! LaTeX Error: No counter 'paragraph' defined.

See the LaTeX manual or LaTeX Companion for explanation. Type  H
<return>  for immediate help.
 ...

l.741 \newcounter{lsubparagraph}[paragraph]

? ! Emergency stop.
 ...

l.741 \newcounter{lsubparagraph}[paragraph]

Your command was ignored. Type  I <command> <return>  to replace it
with another command, or  <return>  to continue without it.


! LaTeX Error: No counter 'paragraph' defined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                             
                                                 
l.741 \newcounter{lsubparagraph}[paragraph]
                                          
?
! Emergency stop.
 ...                                             
                                                 
l.741 \newcounter{lsubparagraph}[paragraph]

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El sexo sin amor es una experiencia vacía. Pero como experiencia vacía es una de las mejores. 

Woody Allen