SYMPTOM:
"Data source name not found and no default driver specified" error appears when connecting to a DSN using DB Query Tool in Strategy 9.x on Linux, as shown below:

Connect failed. Unable to connect. Error type: Odbc error. Odbc operation attempted: SQLDriverConnect. Data source name not found and no default driver specified

ACTION:
Configure the DSN, and remove the space(s) in the name.
NOTE: Go and run following executive file to access the 32-bit ODBC drivers on a 64-bit Windows machine:
\SysWOW64\odbcad32.exe