ODBC connection problem: "The specified DSN contains an architecture mismatch between the Driver and Application"

To manage a data source that connects to a 32-bit driver under 64-bit platform, use c:\windows\sysWOW64\odbcad32.exe. To manage a data source that connects to a 64-bit driver, use c:\windows\system32\odbcad32.exe.

If you use the 64-bit odbcad32.exe to configure or remove a DSN that connects to a 32-bit driver you will receive this message.