Can't load Rgraphviz on windows-based R

L.S.,
I am facing the same problem. I followed the all instructions given in help file and some steps of previous discussion (from google search) but I could not install package Rgraphiviz in windows.  I tried even the instructions given to install Bioconductor package then only able to install in Linux systems but not in Windows. In my opinion, Graphiviz package which creating problems in installation of Rgraphiviz packageis, is doing something wrong or needs some special requirements .

If some body have idea regarding this problem, I am also enthusiastic to see the solution.
Pls, if you find solution, let me know.
I installed it (without problems) on someone's Windows PC yesterday.
The recipe:

1) download and install the Windows installer for graphviz

http://www.graphviz.org/pub/graphviz/stable/windows/graphviz-2.20.3.msi

2) add the path to the graphviz binaries to your PATH environment variable

   o in the Control Panel right click on System -> Properties -> Advanced
         -> Environment Variables
   o edit PATH and add the path to the binaries (ends in ...\bin)

3) install the Rgraphviz package from BioConductor

HTH,
Tobias
--- On Tue, 12/2/08, Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote:

From: Prof Brian Ripley <ripley at stats.ox.ac.uk>
Subject: Re: [R] Can't load Rgraphviz on windows-based R
To: "Daren Tan" <daren76 at hotmail.com>
Cc: r-help at stat.math.ethz.ch
Date: Tuesday, December 2, 2008, 1:47 AM

Rgraphviz is a Bioconductor package, so please ask on the apporpriate 
mailing list (see the posting guide).

On Tue, 2 Dec 2008, Daren Tan wrote:

Hi,

I have problem loading Rgraphviz. Following the instructions specified by
the README in Rgraphviz_1.20.3.tar.gz didn't help either.
o. set the following Windows environment variables accordingly
  (control panel -> systems -> Advanced -> Environment Variables
):
  (a) create new user variables:
    GRAPHVIZ_INSTALL_DIR   (e.g., C:\Graphviz-2.21)
<-------------------------- I stated C:\Graphviz-2.21 (I also tried
C:\/Graphviz-2.21)
    GRAPHVIZ_INSTALL_MAJOR (e.g., 2)               
<-------------------------- I stated 2
    GRAPHVIZ_INSTALL_MINOR (e.g., 20)              
<-------------------------- I stated 21
    Notice the way "\/" are used for the paths above.
  (b) add to user variable 'path': $GRAPHVIZ_INSTALL_DIR/bin
    e.g., C:\Graphviz-2.21\bin                     
<-------------------------- I stated C:\Graphviz-2.21\bin (I also
tried C:\/Graphviz-2.21\/bin)

It should be 'PATH', not 'path': environment variables are
case-sensitive 
(in general, not sure what happens with PATH if set there).

library("Rgraphviz")
Error in inDL(x, as.logical(local), as.logical(now), ...) :
 unable to load shared library
'D:/PROGRA~1/R/R-28~1.0/library/Rgraphviz/libs/Rgraphviz.dll':
 LoadLibrary failure:  The specified module could not be found.
That does not mean Rgraphviz.dll: it means a dependent DLL.  You did 
actually install graphviz, I presume?

In addition: Warning messages:
1: closing unused connection 4
(D:/PROGRA~1/R/R-28~1.0/library/Rgraphviz/libs/Rgraphviz.dll)
2: closing unused connection 3
(D:/PROGRA~1/R/R-2.8.0/library/Rgraphviz/libs/Rgraphviz.dll)
Error : .onLoad failed in 'loadNamespace' for 'Rgraphviz'
Error: package/namespace load failed for 'Rgraphviz'

file.exists("D:/PROGRA~1/R/R-28~1.0/library/Rgraphviz/libs/Rgraphviz.dll")
[1] TRUE

sessionInfo()
R version 2.8.0 (2008-10-20)
i386-pc-mingw32
locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets  methods  
base
other attached packages:
[1] graph_1.20.0
loaded via a namespace (and not attached):
[1] cluster_1.11.11 tools_2.8.0

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and provide commented, minimal, self-contained, reproducible code.

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Can't load Rgraphviz on windows-based R

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