readRAST6: too many open files

We're using
rastdum <- readRAST6("nomdum",cat=F,ignore.stderr = T)

(on a ubuntu 8.10 machine and R 2.9)
within a for() loop of hundreds of iterations.

At some point (ca. 199) we get an error
"Too many open files"

and suspect that this is because readRAST6() is opening
and not closing files. Is this a bug?

Possibly, but a complete sessionInfo() would be necessary - the versions 
of the packages involved may matter. Does this reproduce with readRAST6() 
in a loop reading say the same raster? I've run 300 reads of spearfish 
elevation.dem without seeing problems for:

sessionInfo()

R version 2.9.0 (2009-04-17)
i386-pc-mingw32

locale:
LC_COLLATE=Norwegian (Bokm?l)_Norway.1252;LC_CTYPE=Norwegian 
(Bokm?l)_Norway.1252;LC_MONETARY=Norwegian 
(Bokm?l)_Norway.1252;LC_NUMERIC=C;LC_TIME=Norwegian (Bokm?l)_Norway.1252

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

other attached packages:
[1] spgrass6_0.6-5 XML_2.3-0      rgdal_0.6-8    sp_0.9-36

loaded via a namespace (and not attached):
[1] grid_2.9.0      lattice_0.17-22

Roger

I remember having
a similar problem with writeGDAL() on a win machine a long ago,
but that problem was fixed.

Thanks

Agus

Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no