Hi We just got a new 520 with v5r3..I loaded the new "Iseries accesss" on my pc.It worked fine to the new machine and all our old machines via 5250... But when I tried using the odbc driver(10.0.0) then I kept on getting key violations with the old machines(v3r7 upwards) odbc did work on the new box though...... Any help?!?