[GRASS-stats] "g.region: command not found" using readRAST6 command

[Tim Holland]

Hello, 

I'm sorry to keep making so much noise on the list for what I'm sure are
basic questions.  

I am having trouble loading in a GRASS raster into R using the readRAST6
command.  

Using: 
>readRAST6("rasterMap",mapset="/Users/etc/my_mapset")

I get the following error:
>Error in if (file.exists(file) == FALSE) if (!missing(asText) && asText == 
: 
  argument is of length zero
>Error in parseGRASS(cmd) : g.region not parsed
>sh: g.region: command not found

Is there something I am doing wrong here?  

Also, when I am working with spgrass6 in general, should I have my working
directory set to the GRASS DBase I am using, or does that matter?  

Thank you for the help, 
Tim


> sessionInfo()
R version 2.9.2 (2009-08-24) 
i386-apple-darwin8.11.1 

locale:
en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

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

other attached packages:
[1] spgrass6_0.6-9 XML_2.6-0      rgdal_0.6-12   sp_0.9-44     

loaded via a namespace (and not attached):
[1] grid_2.9.2      lattice_0.17-25


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