Using R 3.0.1 on a Mac OS X 10.8.3 I have been unable to load the package
Rcmdr.

I am not a regular Mac user, but I need to be able to help my students who
have Macs install R and Rcmdr to use it in my Intro Stats class. To that
end, this week I have been working on a Mac from our loaner pool. I have
been able to successfully install Rcmdr on Macs of all OS X types with
previous versions of R, so this is a new problem for me.

Note that before attempting to install or load Rcmdr I installed XQuartz
and I can plot to a graphics window without any problems so I assume it is
working properly.

Following the directions on
http://socserv.mcmaster.ca/jfox/Misc/Rcmdr/installation-notes.html I have
been able to install the Rcmdr package without apparent problems. But when
I attempt to load the Rcmdr package, either with the Package Manager or by
typing

> library(Rcmdr)

I get the following error messages:

Loading required package: car
Loading required package: MASS
Loading required package: nnet
Error : .onLoad failed in loadNamespace() for 'tcltk', details:
  call: dyn.load(file, DLLpath = DLLpath, ...)
  error: unable to load shared object
'/Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so':

dlopen(/Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so,
10): Library not loaded: /usr/local/lib/libtcl8.6.dylib
  Referenced from:
/Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so
  Reason: no suitable image found.  Did find:
 /usr/local/lib/libtcl8.6.dylib: stat() failed with errno=13
/usr/local/lib/libtcl8.6.dylib: stat() failed with errno=13
Error: package or namespace load failed for ‘Rcmdr’

 It looks to me like Rcmdr is attempting to load a tcltk  CRAN package
which no longer exists with R 3.0.1 (which is now bundled with Tck/Tk 8.6.0).
 One of the many things I have tried is installing
tcltk-8.5.5-x11.pkg<http://cran.cnr.berkeley.edu/bin/macosx/tools/tcltk-8.5.5-x11.pkg>,
but, as warned, that did not work. I have contacted the Rcmdr package
author who suggested that I uninstall R (which was an adventure in and of
itself) and reinstall it, but I had the same exact problems. He also
suggested that I seek help on the R Mac OS X help list and so here I am. I
am hoping someone can point me toward a solution as the start of the
semester is nearly upon us.

Thank you,
Sarah Hardy

-- 

Sarah Hardy, PhD
Associate Professor of Mathematics
University of Maine Farmington
207-778-7124    Office: Brinkman 100

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