On Mon, 7 Feb 2005, John Fox wrote:
Dear Shlomo,
Just last week I experienced a similar problem with RODBC and MySQL under Windows, though the problem extended to both Rterm *and* Rgui. After a fair amount of detective work, I discovered that the source of the difficulty was a newly downloaded MySQL ODBC Windows driver. When I instead installed a driver downloaded last December, everything worked fine. I've just confirmed that I can access MySQL from both Rterm and Rgui. I'm using R 2.0.1 under Windows XP.
Since your symptoms are slightly different from mine, the ODBC driver may not be the source of the difficulty, but I thought that it might be worthwhile to mention it.
There are two problems here
1) The latest MyODBC (3.51-10) has a problem that 3.51-07 did not have, as I found yesterday on both Linux and Windows (I am preparing an RODBC update).
I've now read the sources, and it has a logic bug: it throws the error
state IM008 Invalid window handle for connection completion argument
whether or not any completion is needed. RODBC 1.1-3 will have a workaround for this.
2) There _is_ a documented difference between RGui and Rterm: see ?odbcConnect:
Under the Windows GUI, specifying an incomplete 'connection', for
example the default '""', will bring up a dialog box to complete
the information required. (This does not work from 'Rterm.exe'
unless a driver is specified, a Windows restriction.)As a result of these two, MyODBC 3.51-10 ought to work under RGui and not under Rterm.
Moral: if you can, downgrade your MyODBC driver, or wait for RODBC_1.1-3
Brian
-- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
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