readVECT6 error in spgrass6 (CVS version)

On Mon, 20 Apr 2009, William McCoy wrote:

I am trying to duplicate the example of T. Hengl given in his message 
of  2 Apr 2009 regarding "Running analysis on DEMs using GRASS (from 
R?)".  I have retrieved the latest CVS version (as of last night) of 
spgrass6 (v. 0.6-5). I am running on a 32-bit Intel Fedora 10 system.

Everything seems to work up until the point that I try to import the 
streamt vector file into R:

streamt <- readVECT6("streamt")

Error in readOGR(dsn, layer = "1", verbose = !ignore.stderr, 
pointDropZ = pointDropZ) :
 unused argument(s) (pointDropZ = FALSE)

Apparently readOGR has no "pointDropZ" argument and the rgdal 
documentation seems to confirm this.  Is this a bug in this CVS 
version of spgrass6?

No, but you need the CVS version of rgdal too. The GRASS OGR plugin 
spuriously generates a third coordinate, so that its use in spgrass6, 
using rgdal (readOGR) led to a failure in a later script. The released 
versions of both packages are in sync, to have CVS spgrass6 work, use 
the CVS rgdal (sourceforge project rgdal, module rgdal).

Roger

Here is my sessionInfo():

sessionInfo()

R version 2.8.1 (2008-12-22)
i386-redhat-linux-gnu

locale:
LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICATION=C 


attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] spgrass6_0.6-5  XML_2.3-0       rgdal_0.6-7     maptools_0.7-22
[5] sp_0.9-34       foreign_0.8-34

loaded via a namespace (and not attached):
[1] grid_2.8.1      lattice_0.17-22 tools_2.8.1