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puzzling RODBC error

3 messages · ONKELINX, Thierry, Bart Joosen, Marc Schwartz

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
Error in sqlQuery(channnel = MDB, "SELECT gebiedscode FROM ganzengebieden;") :
  first argument is not an open RODBC channel
TABLE_SCHEM                    TABLE_NAME   TABLE_TYPE REMARKS
13        <NA>                ganzengebieden        TABLE    <NA>
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 at 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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Bart Joosen
# 
It seems that your sqlTables also give no results.
So there must be something wrong with the ODBC connect.

I didn't use odbcConnectAccess, but made an ODBC connection, and then used
ODBCconnect to connect to our database.
Maybe you can define a user DSN and try it this way?


Bart



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Marc Schwartz
#
On Nov 26, 2012, at 7:37 AM, "ONKELINX, Thierry" <Thierry.ONKELINX at inbo.be> wrote:

            

      
      
      
    

        
Some comments:

1. DB related posts should go to R-SIG-DB:

  https://stat.ethz.ch/mailman/listinfo/r-sig-db

2. You might try to use odbcConnectAccess2007() to see if that provides a resolution.

3. You might also be sure that you don't have a 32/64 bit mis-match between the ODBC drivers, the DSN configuration and Access. I note that you are running 32 bit R on Windows, so perhaps you have already looked into this. There is some additional info on this in the RODBC vignette and some posts in the archives suggesting that you might get other errors, but worth considering if you have not. The crash suggests that something is amiss in the configuration.

Regards,

Marc Schwartz