If you use a database to source data, Data Clustering Engine requires an ODBC API to access the database.
Unless you use Oracle, install and configure the ODBC drivers for your database. Data Clustering Engine does not use the Oracle ODBC driver and uses custom ODBC drivers for Oracle,
ssaoci9.dll
on Windows and
libssaoci9.so
on UNIX. The custom drivers do not require any further configuration.