[R] puzzling RODBC error

[ONKELINX, Thierry]

Dear all,

I'm trying to connect to an MSAccess database (ArcGIS personal geodatabase). I keep getting an error about the channel when using sqlQuery(). However, sqlTables() does not complain about the channel and lists all tables in the database. If I try sqlFetch(), then R crashes.

I'm happy to hear suggestions on how to solve this.

Best regards,

Thierry

> MDB <- odbcConnectAccess("//inbodata/indata/Projects/PRJ_Watervogels/Geoloket/Telgebieden watervogeltellingen/Watervogellocaties_copy.mdb")
> sqlQuery(channnel = MDB, "SELECT gebiedscode FROM ganzengebieden;")
Error in sqlQuery(channnel = MDB, "SELECT gebiedscode FROM ganzengebieden;") :
  first argument is not an open RODBC channel
> sqlTables(channel = MDB) #truncated output!
   TABLE_SCHEM                    TABLE_NAME   TABLE_TYPE REMARKS
13        <NA>                ganzengebieden        TABLE    <NA>
> sqlFetch(channel = MDB, 'ganzengebieden') #makes R crash

> sessionInfo()
R version 2.15.2 (2012-10-26)
Platform: i386-w64-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=Dutch_Belgium.1252  LC_CTYPE=Dutch_Belgium.1252
[3] LC_MONETARY=Dutch_Belgium.1252 LC_NUMERIC=C
[5] LC_TIME=Dutch_Belgium.1252

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

other attached packages:
[1] RODBC_1.3-6

loaded via a namespace (and not attached):
[1] tools_2.15.2


ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx op inbo.be
www.inbo.be

To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey


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