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- Microsoft Access Odbc Connection Failed
- Odbc Microsoft Access Setup
- Odbc Microsoft Access Setup Map Without Drive Letter
I have created a few Access 2013 databases that I try to connect to via ODBC. After setting up the DNS with the 32bit ODBC I cannot connect to the database. The errors is ODBC MS Access driver cannot open database. It my not be a database that your application recognizes ('unknown'). The database was created under Access 2013 (64 bit) on a Windows 7 (64 bit) machine. I need to use the 32bit ODBC because the client application is 32 bit. The problem does not appear when using an Acccess 2010 or earlier database (the Access 2010 is a 32 bit version).
I have this problem even when using a database that has one table, with an autonumber and a single text field filled with a single entry. I would like to continue to use Access 2013 because of the web app functionality but without ODBC working I may have to downgrade to Office 2010. Any suggestion on how to solve this ODBC connection problem? Are you telling me that ODBC is sensitive to the application that created the tables? No, but the bit of the data engine has to match the ODBC driver (so similar result, but differnt reason). Yes in this case sensitivity does exist.
You MUST use the x64 bit drivers. So for Access 2007 and beyond, you need to use “ACE” (which has replaced JET). The tables created by Access can be used by both x32/x64 versions of ACE.
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So in your Excel 2007 test you had the x32 database engine installed and were using the x32 version of ODBC. So tables created by Access can be read with x32 or x64 versions of Access and ACE. And as a general rule an x32 ODBC driver can grab data from SQL server x64. However in this case you are using BOTH ODBC and a LOCAL copy of the Access database engine. That engine comes in two flavors (x32, and x64).
And in this case, you NOT grabbing data from a “service” but are running code as what we call “in-process”. So the x32 ODBC driver HAS to use the x32 ACE database engine. The x64 ODBC driver MUST use the x64 ACE database engine. So while a ODBC driver to SQL server is bit neutral, the ODBC driver when connecting to ACE data engine MUST match because the database engine is running ON YOUR computer.
If Access could run as a “service” on a server, then either ODBC driver could work. (because you connecting to a service as opposed to running software local and consuming that software). The best way to “grasp” this issue is Word 32 cannot automate an x64 bit edition of Outlook. So any “inter process” communication via “COM” software installed local must have the same bit size.
So your web browser does not care if the web server is x32, or x64 because you NOT running that web service on your computer – only connecting to it and grabbing web pages, or in this case data. So this works different then SQL server because you running BOTH ODBC and ALSO the database engine on the SAME machine – for the ODBC driver to launch + use a copy of the ACE database engine, the bit size must match. So while the accDB tables can be used by Access x32/x64, both Access and the ACE must match bit size.
Microsoft Access Odbc Connection Failed
And in your case you not using Access, but ODBC, but eventually this resolves down to a local copy the ACE data engine – and it has to match the front end, even if that front end is ODBC. So ACE does not run as a service, but is simply some software being “consumed” by the Access front end, or in this case the ODBC driver.
The ODBC driver thus has to “consume” the ACE engine to read the data and this requires the same bit size for such in-process communication. So using Access front ends, or ODBC as your front end on your local computer requires that bit size match to connect + consume the ACE data engine. Regards, Albert D. Kallal (Access MVP) Edmonton, Alberta Canada.
Odbc Microsoft Access Setup
Data Source DNS Entries = value. Entering a non-zero value indicates that DNS contains cop entries for the database name and the last cop entry is value.
Odbc Microsoft Access Setup Map Without Drive Letter
The first connection attempt will chose a random number between 1 and value. Each subsequent connection will then increment to the next number (round-robin). This approach will not encounter costly DNS resolution failures (how costly depends on how the DNS is configured). However, if additional entries are added to DNS at a later time, they will not be discovered by the ODBC Driver for Teradata unless the supplied value is increased.