Dear DBA Gurus, I am getting the above error while running the below JDBC program. Can anyone help me in solving the problem? TIA and Regards, Ranganath import java.sql.*; import java.io.*; public class Alert { public static void main(String args[]){ int status = 1; int timeout = 5; String message = new String(); try { String username="SCOTT"; String password="TIGER"; Class.forName("oracle.jdbc.driver.OracleDriver"); String dburl = "jdbc:oracle:oci8:@orcl1"; Connection dbcon = DriverManager.getConnection(dburl,username,password); CallableStatement cstmt1 = dbcon.prepareCall("begin sys.dbms_alert.register('I_GOT_IT'); end;"); cstmt1.execute(); System.out.println("We are waiting for waitone signal"); CallableStatement cstmt2 = dbcon.prepareCall("begin sys.dbms_alert.waitany('I_GOT_IT',:message,:status,5); end;"); cstmt2.execute(); if (status == 0) { System.out.println("We have received the signal"); System.out.println("The message that has been received is " + message); System.out.println("Status and time are " + status + timeout); } else System.out.println("No message has been received. EXit Session"); CallableStatement cstmt3 = dbcon.prepareCall("begin sys.dbms_alert.remove('I_GOT_IT'); end;"); cstmt3.execute(); dbcon.close(); } catch(SQLException nExp) { System.out.println("Connection Failed, SQLException = " + nExp.toString()); } catch(Exception e) { System.out.println("Connection Failed, Exception = " + e.toString()); } } } -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Ranganath K INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).