Your libname statment may be incomplete for using ODBC, it should look like
LIBNAME libref odbc <connection-options> <LIBNAME-options>;
With netezza instead of odbc in your code it is attempting to use the Netezza engine which requires that specific license. And you may want to use DATAsrc=NZSQL instead of DSN. From the documentation:
DSN= is an alias for this option that indicates that the connection is attempted using the ODBC SQLConnect API, which requires a data source name. You can also use a user ID and password with DSN=. If you want to use an ODBC file DSN, then instead of supplying DATAsrc=<'>ODBC-data-source<'>, use the PROMPT= or NOPROMPT= option followed by "filedsn=(name-of-your-file-dsn);". For example:
libname mydblib odbc noprompt="filedsn=d:\share\msafiledsn.dsn;";