I have been disappointed recently because of the amount of time that it takes to get any kind of answer to my problem. The fact is that I have seen this problem posted before but with no clear resolution. This problem did not start until I upgraded to the version 3.4.6.4 of DOA with Delphi 6. The problem is that when I use a TOracleDataset with a parameterized query I get a message "ora-010008: not all variables bound" error message. When the original TOracleDataset is set up the parameter variable is set by using the Scan SQL command button. When I go to the Clientdataset and fetchparams I get "list box out of bounds(0)". If I try to "Add fields" on the clientdataset I get the "ora-010008: not all variables bound" error message and the Variable in the TOracledataset disappears. I tried unstalling and reinstalling and the problem continues. I have much work to do and am in desperate need of an answer.