I presume this on Windows, but you did not say!
There seems to be a recent problem with Rcmd INSTALL, in that it installs 
under VR, not separately.  But that is the opposite of `merging' the 
packages which are kept separate.  It was not intentional, and has been 
fixed.
The "VR" (7.1-14) bundle is the wrong version for 1.9.0 (alpha), and
it
should not Rcmd check there.
Please do not post to both R-devel and R-help, and for pre-release
versions please use R-devel.
On Wed, 17 Mar 2004, Jens Henrik Badsberg wrote:
> 
> What is it "Package bundles" and 1.9.0 (alpha) ?
> 'Rcmd check Bundle' aborts with:
> Error: cannot open file '.../Bundle.Rcheck/Package/R/Package' for
reading
> In ".../Bundle.Rcheck/" the packages of the bundle are
"merged" into a single
> "package".  ('Rcmd INSTALL' does also "merge"
the packages of the bundle.)
> I do not in "Writing R Extensions", version 1.9.0, section 1.1.5,
see any
> changes (relative 1.8.1) on how bundles should be handled.
> I get the same on abort on the "VR" (7.1-14) bundle.
-- 
Brian D. Ripley,                  ripley@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