Open Database Connectivity (ODBC) is a standard API for accessing database management systems (DBMS). Whether you are a developer connecting a Python script to a SQL Server, a data analyst linking Excel to a PostgreSQL database, or a system administrator configuring a legacy application, installing the correct ODBC driver is the critical first step.

You are trying to connect a 64-bit application to a 32-bit DSN (or vice versa). Fix:

The driver was not installed correctly, or you are looking in the wrong bit-version of the Administrator. Fix: