[GRASS-stats] Error when starting grass from R (grass installed thru osgeo4w)

[Helmut Kudrnovsky]

>I could reproduce the problem after starting the OSGeo4W console from the
>desktop shortcut icon.
>
>The problem seems to be that OSGeo4W's console starts in a directory for
>which the user does not have write access (for me from a desktop shortcut
>C:\Users\Public\Desktop\OSGeo4W). Because rgrass7::initGRASS() needs to
>write a GISRC file in the working directory, it needs write access. When I
>changed working directory to one to which I did have write access, the
>current CRAN binary rgrass7 loaded correctly under OSGeo4W for a
>throw-away location. I haven't yet tried with a pre-existing location.
>
>Could you check and see whether this seems reasonable?
>
>If so, I'll add a check for write access in the working directory to give
>a more sensible error message.

tested here with an existing location while changed the working directory to
writable directory:

----------------------
run o-help for a list of available commands
C:\>d:

D:\>cd temp

D:\temp>cd testR

D:\temp\testR>R

R version 3.4.4 (2018-03-15) -- "Someone to Lean On"
Copyright (C) 2018 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)

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> library(rgrass7)
Lade nötiges Paket: sp
Lade nötiges Paket: XML
GRASS GIS interface loaded with GRASS version: (GRASS not running)
> initGRASS(gisBase = "C:/OSGeo4W64/apps/grass/grass-7.4.1",
+ gisDbase = "D:/grassdata/", location = "nc_spm_08_grass7",
+ mapset = "user1", SG="elevation")
gisdbase    D:/grassdata/
location    nc_spm_08_grass7
mapset      user1
rows        474
columns     526
north       228527.2
south       215018.2
west        629980
east        644971
nsres       28.5
ewres       28.5
projection  +proj=lcc +lat_1=36.16666666666666 +lat_2=34.33333333333334
+lat_0=33.75 +lon_0=-79 +x_0=609601.22 +y_0=0 +no_defs +a=6378137
+rf=298.257222101 +towgs84=0.000,0.000,0.000 +to_meter=1
Warnmeldung:
In dir.create(gisDbase) : 'D:\grassdata' existiert bereits
> g <- gmeta()
> g
gisdbase    D:/grassdata/
location    nc_spm_08_grass7
mapset      user1
rows        474
columns     526
north       228527.2
south       215018.2
west        629980
east        644971
nsres       28.5
ewres       28.5
projection  +proj=lcc +lat_1=36.16666666666666 +lat_2=34.33333333333334
+lat_0=33.75 +lon_0=-79 +x_0=609601.22 +y_0=0 +no_defs +a=6378137
+rf=298.257222101 +towgs84=0.000,0.000,0.000 +to_meter=1
>
---------------------

yes, the issue is that OSGeo4W's console starts in a directory for
which the user does not have write access.

changing to a directory with write access starting grass from R works as
expected.

I'll change the wiki accordingly.

>If so, I'll add a check for write access in the working directory to give
>a more sensible error message.

that would be helpful.




-----
best regards
Helmut
--
Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Stats-f4049448.html