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On Vista 32bit and Windows 7 I get the following error using the AccessProvider trying to open the access database file.

"[Microsoft][ODBC Microsoft Access Driver]Invalid string or buffer length"

To recreate the problem do the following while running Vista 32 bit or Windows 7 RTM 32 bit.

UniConnection1.ProviderName:= 'ACCESS';
UniConnection1.Database:= 'C:\myapp\mydatabase.mdb';
UniConnection1.Connect;

This was testing with a clean VM of Windows 7 RTM. This same code works on Windows XP Pro SP3.

We have fixed this problem. The fix will be included in the next build of UniDAC.

Great, glad you found the issue. Now, we need this fix ASAP. Can we get a pre-release build, updated source code or at least instructions on where to fix this in the source we purchased? We hit a brick wall with this issue on our ms access database version and cannot wait a month or more for a major fix like this to continue testing. Our Vista and Win 7 testers cannot connect to the database at all because of this issue.

Thanks

Find the TODBCConnection.ObtainDriverInfo procedure in ODBCClasses.pas.
Replace the line with