This happens when a 32-bit application tries to use a 64-bit DSN. If your software is 32-bit, you must run the 32-bit ODBC Administrator located at C:\Windows\SysWOW64\odbcad32.exe and create the DSN there using the 32-bit driver. Missing DLLs
Searching for a comprehensive review of the on Windows 7 64-bit reveals a stable, legacy-friendly solution that remains the standard for connecting Windows applications—like Excel, Access, or custom .NET tools—to PostgreSQL databases . Overview of psqlODBC on Windows 7 postgresql odbc windows 7 64 bit
On Windows 7, the driver is praised for its "set it and forget it" reliability. Once the Data Source Name (DSN) is configured, connection drops are rare, provided the network layer is stable. This happens when a 32-bit application tries to
Click the button. If successful, you will see a "Connection successful" message. Click Save to finalize. Troubleshooting Common Windows 7 Issues "Architecture Mismatch" Error Overview of psqlODBC on Windows 7 On Windows
Connecting a 64-bit Windows 7 system to a PostgreSQL database via ODBC requires specific drivers and a precise configuration process. Because Windows 7 handles 32-bit and 64-bit drivers separately, using the wrong version of the "ODBC Data Source Administrator" is the most common cause of connection failure.
If you install the 64-bit driver but try to connect via 32-bit Excel, the database will not be visible.
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