ORA-28538

Error: ORA-28538: result set not found

Causa: The client program tried fetching from a result set that is no longer open. Many gateways will, on execution of a stored procedure, automatically close all result sets that were returned by any previously executed stored procedure.

Acción: Check the documentation for the gateway that you are using and see if it will automatically close currently open result sets each time a stored procedure is executed. Then check if your client program is violating this rule. If it is, fix your program. If it is not, contact Oracle Support Services.