[R] Can't load Rgraphviz on windows-based R

[Rory.WINSTON at rbs.com]

You can get LoadLibrary failures if a dependency is not found (e.g. a required dll or shlib used by the dll that you are explicitly loading). So make sure that all necessary dependencies (e.g. graphviz libs) are available in the system path.

Rory


Rory Winston
RBS Global Banking & Markets
Office: +44 20 7085 4476

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Daren Tan
Sent: 02 December 2008 09:37
To: r-help at stat.math.ethz.ch
Subject: [R] Can't load Rgraphviz on windows-based R


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)


> 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.

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.d
> ll")
[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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