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

Rory.WINSTON at rbs.com Rory.WINSTON at rbs.com
Tue Dec 2 18:19:21 CET 2008

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 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


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)
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

R-help at r-project.org mailing list
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

The Royal Bank of Scotland plc. Registered in Scotland No 90312. Registered Office: 36 St Andrew Square, Edinburgh EH2 2YB. 
Authorised and regulated by the Financial Services Authority 

This e-mail message is confidential and for use by the=2...{{dropped:22}}

More information about the R-help mailing list