[Rd] Require of gWidgetsRGtk2 fails: RGtk2.dll can't be found, but it's there

[Prof Brian Ripley]

On Fri, 10 Jun 2011, Janko Thyson wrote:

> Dear list,
>
> I've been trying to get gWidgets/gWidgetsRGtk2 to run every other month for a 
> while, but somehow I simply can't figure out what's going wrong.

Your subject line indicates your confusion.  It does not say RGtk2.dll 
cannot be found (at least, the English version of the message does not 
say so).

What it means is that RGtk2.dll or one of the DLLs it depends on 
cannot be found.  See the instructions at
http://cran.r-project.org/bin/windows/contrib/2.13/@ReadMe

It is Microsoft's error message, not ours.

>
> I tried several distributions of the GTK runtime environment for Windows 
> (http://downloads.sourceforge.net/gladewin32/gtk-2.12.9-win32-1.exe as 
> described in the package's vignette, 
> http://ftp.gnome.org/pub/gnome/binaries/win32/gtk+/2.22/gtk+-bundle_2.22.1-20101227_win32.zip)
>
> I also included GTK in my Windows PATH.
>
> Yet, when I run 'require(gWidgetsRGtk2)', R complains that the RGtk2.dll 
> can't be found/loaded (see below). But this file definitely exists. I'm 
> running R-2.13.0 from a USB Device but made sure that args 'destdir' and 
> 'lib' are set propperly in 'install.packages'.
>
> Loading required package: gWidgetsRGtk2
> Loading required package: gWidgets
> Error in inDL(x, as.logical(local), as.logical(now), ...) :
>  unable to load shared object 
> 'R:/Apps/R/R-2.13.0/library/RGtk2/libs/i386/RGtk2.dll':
>  LoadLibrary failure:  Das angegebene Modul wurde nicht gefunden.
>
> Failed to load RGtk2 dynamic library, attempting to install it.
> Learn more about GTK+ at http://www.gtk.org
> If the package still does not load, please ensure that GTK+ is installed and 
> that it is on your PATH environment variable
> IN ANY CASE, RESTART R BEFORE TRYING TO LOAD THE PACKAGE AGAIN
> Error : .onAttach failed in attachNamespace() for 'gWidgetsRGtk2', details:
>  call: .Call(name, ..., PACKAGE = PACKAGE)
>  error: C symbol name "S_gtk_icon_factory_new" not in DLL for package 
> "RGtk2"
>
> Best regards,
> Janko
>
> R version 2.13.0 (2011-04-13)
> Platform: i386-pc-mingw32/i386 (32-bit)
>
> locale:
> [1] LC_COLLATE=German_Germany.1252  LC_CTYPE=German_Germany.1252
> [3] LC_MONETARY=German_Germany.1252 LC_NUMERIC=C
> [5] LC_TIME=German_Germany.1252
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> other attached packages:
> [1] gWidgets_0.0-44
>
> loaded via a namespace (and not attached):
> [1] gWidgetsRGtk2_0.0-74 RGtk2_2.20.12        tools_2.13.0
>>
>
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> https://stat.ethz.ch/mailman/listinfo/r-devel
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595