Hi Generoso, That is a good question. Our server is Solaris, so I poked around and found /opt/teradata/client/odbc64/samples/C. I ran the adhoc program, but discovered that the file that I am referencing in my code ($ENV{'ODBCINI'} = '/path/to/.odbc.ini';) is NOT the same odbc.ini file that /opt/teradata/client/odbc64/samples/C references. It seems that I need to add my dsn entry to /opt/teradata/client/odbc64/odbc.ini for it to work. Do I also need to add it to odbcinst.ini too? Is that correct? Am I on the right track? Thanks Edit: Added sentence about odbcinst.ini.