This feature was removed in ODBC Driver for Teradata 16.20.
By default, CALL statements are considered as the SQL for MACRO execution, and the statements are converted to EXEC with ODBC Driver for Teradata. The CallSupport or DisableCALLToEXECConversion keywords are currently available to disable conversion of CALL statements to EXEC, so the statements are handled as CALL statements for stored procedure execution.
This feature was originally designed for earlier versions of ODBC Driver for Teradata, and was removed in 16.20.