Starting with the 16.20 release, a new ODBC driver, based on Simba Technologies' Engine (SEN), replaces the existing Teradata ODBC Driver. The differences between the prior Teradata ODBC Driver (pre-16.20 versions) and the Teradata ODBC Driver 16.20 are documented in the "New Teradata ODBC Driver Compatibility Reference" appendix of the ODBC Driver for Teradata User Guide.