Hola,

Aquí puedes encontrar una descripción de cómo solucionar el problema que
encuentras:

http://permalink.gmane.org/gmane.science.biology.informatics.conductor/32589

Básicamente, la parte en la que tienes que fijarte es esta:

and then add the path to the 'bin' directory of the installation to your
system's PATH variable (Control Panels -> System -> Advanced Settings ->
Environment Variables, then 'new' or 'edit' a user variable to be named
PATH as a semi-colon separated list of directory paths. When I did this
and restarted R, I saw in part

 > Sys.getenv("PATH")
"<...>;C:\\Program Files (x86)\\Graphviz2.20\\bin;<...>"

where <...> are other paths not relevant to Rgraphviz, the the path that
I have might differ from the path that you have. To ensure that I had
entered the right PATH, I then did

 > list.files("C:\\Program Files (x86)\\Graphviz2.20\\bin")
  [1] "acyclic.exe"                    "bcomps.exe"
  [3] "ccomps.exe"                     "circo.exe"
  [5] "comdlg32.ocx"                   "diffimg.exe"
  [7] "dijkstra.exe"                   "dot.exe"
  [9] "dot2gxl.exe"                    "dotty.exe"




Saludos,
Carlos Ortega
www.qualityexcellence.es
www.datanalytics.com/blog

On Sun, Jan 2, 2011 at 2:33 PM, cesar procopio <cesarpro@yahoo.com> wrote:

> Buen dia y feliz año para todos!
>
> El motivo de mi consulta es que al cargar el paquete 'Rgraphviz' me aparece
> en
> pantalla este mensaje:
>
> Error : .onLoad failed in loadNamespace() for 'Rgraphviz', details:
>   call: value[[3L]](cond)
>   error: unable to load shared object
>
> 'C:/Users/Cesa/Documents/R/win-library/2.12/Rgraphviz/libs/i386/Rgraphviz.dll':
>   LoadLibrary failure:  No se puede encontrar el módulo especificado.
>
>   Check that (1) graphviz is installed on your system; (2) the
>   installed version of graphviz matches '2.20.3'; this is the version
>   used to build this Rgraphviz package; (3) graphviz is accessible to
>   R, e.g., the path to the graphviz 'bin' directory is in the system
>   'PATH' variable.  See additional instructions in the 'README' file of
>   the Rgraphviz 'source' distribution, available at
>   http://bioconductor.org/packages/release/bioc/html/Rgraphviz.html
>   Ask further questions on the Bioconductor mailing list
>   http://bioconductor.org/docs/mailList.html
>
> Error: package/namespace load failed for 'Rgraphviz'
>
> y ademas una ventana de error que me dice:
>
> "......no se encontro libcdt-4.dll la reinstalacion de la aplicacion puede
> solucionar el problema"
>
> Muchas gracias por las respuestas!!
>
>
>
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>
>
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>

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