[R] about the possible errors in Rgraphviz Package

[Duncan Murdoch]

On 30/03/2010 10:44 AM, HU,ZHENGJUN wrote:
> Hi All,
>
>   I tried to install the package of Rgraphviz in the following two 
> ways successfully:
>
> source("http://bioconductor.org/biocLite.R")
> biocLite("Rgraphviz")
>
> install.packages(pkgs="C:/Progra~1/R/lib_download/Rgraphviz_1.24.0.zip", 
> lib="C:/Progra~1/R/R-2.10.1/library", repos=NULL)
>
> but when I loaded the package though library(Rgraphviz) or 
> library("Rgraphviz"), and got the same error message below:
>
> "Error in inDL(x, as.logical(local), as.logical(now), ...) :
>   unable to load shared library 
> 'C:/PROGRA~1/R/R-210~1.1/library/Rgraphviz/libs/Rgraphviz.dll':
>   LoadLibrary failure:  The specified module could not be found."
>   

Most likely the problem is that you haven't followed the installation 
instructions.  (They are pretty hard to find, but I think you can find 
them on the Bioconductor site.)  It is not enough to install the 
Rgraphviz package, you also need to install Graphviz.

Duncan Murdoch
> I think that it is the error in the package because it should go 
> to 'C:/PROGRA~1/R/R-2.10.1/library/Rgraphviz/libs/Rgraphviz.dll' 
> instead of 
> 'C:/PROGRA~1/R/R-210~1.1/library/Rgraphviz/libs/Rgraphviz.dll'
>
> Could anyone help me to solve to problem?
> Thank you very much for the help. Howard
>
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