Thanks for all the help on the TCP port number. I think that Alex's info= was what I needed. The ODBC driver that I am referring to does not use t= he Informix system at all. It came with the old Data For Windows package an= d I think 55555 is the correct number. Cyrus Taft EPRI I&C Center Message text written by INTERNET:foxboro@xxxxxxxxxxxxx >Hi, my experience with ODBC drivers goes in another direction than Alex =3D wrote about it. I think that an ODBC driver accesses the informix database (with the =3D configuration data for the historian) through the informix star =3D software. Please check your system: < _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave