ADO error - large data set

Gyula gygulyas at
Wed Mar 19 17:14:49 CET 2008

Hi there,

I have been running Python to tap into an MS Access 2003 database
using ADO (PythonWin+COM). Everything works great creating recordsets
etc. when I open a table with a small number of records. However, when
I try to run the same Python code with a large table (>100,000) I get:

Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\pythonwin\pywin\framework
\", line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Documents and Settings\user\Desktop\PythonWS\scripts
\", line 43, in <module>
    rs.Open('SELECT * FROM ' + tblname, oConn, 1, 3)
  File "C:\Python25\lib\site-packages\win32com\gen_py\2A75196C-", line 2364, in Open
    , ActiveConnection, CursorType, LockType, Options)
com_error: (-2147352567, 'Exception occurred.', (0, None, None, None,
5003251, -2147467259), None)

The small and large table structures are identical, all I do is change
the tblname from input1000 (1000 records) to input (>100000 records).
I use optimistic locking and keyset cursor..nothing out of the

Any ideas? ADO 2.8 is what I am using.

Thanks a lot!

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