Segmentation fault when calling dbms_alert.register() procedure from OCCI

Question

I am trying to call the dbms_alert.register() from the OCCI but I get segmentation fault when I run the program, here is the code snippet. I am gettin segmentation fault immediately after calling setSQL() method.
Environment *occiEnvironment_;
Connection *occiConnection_ ;
string userName("SCOTT");
string userPasswd("tiger");
string url("");
occiEnvironment_ = Environment::createEnvironment();
try{
occiConnection_ = occiEnvironment_->createConnection(userName,userPasswd,url);
Statement *occiStatement1;
cout << "Before setSQL" << endl;
occiStatement1->setSQL("BEGIN dbms_alert.register(:1); END;");
cout << "After setSQL" << endl;
string alert1("MY_ALERT");
occiStatement1->setString(1,alert1);
occiStatement1->execute();
catch (SQLException ea)
cout << ea.what();
}

Answer 1

Thanks for the reply, now I dont see segmentation fault.
I tried to exted the code further to wait for the registered events, I added the following code, I do get and event but then get the exception:
Statement *occiStatement1 = occiConnection_->createStatement();
Statement *occiStatement2 = occiConnection_->createStatement();
string alert, msg;
int status;
occiStatement1->setSQL("BEGIN dbms_alert.register(:1); END;");
string alert1("MY_ALERT");
occiStatement1->setString(1,alert1);
occiStatement1->execute();
occiStatement2->setSQL("BEGIN dbms_alert.waitany(:alert,:msg,:status); END;");
occiStatement2->registerOutParam(1, OCCICHAR, sizeof(alert));
occiStatement2->registerOutParam(2, OCCICHAR, sizeof(msg));
occiStatement2->registerOutParam(3, OCCIINT, sizeof(int));
occiStatement2->execute();
===========================================================
ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SYS.DBMS_ALERT", line 252
ORA-06512: at line 1
ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SYS.DBMS_ALERT", line 252
ORA-06512: at line 1
*** glibc detected *** free(): invalid pointer: 0x08619c48 ***
Aborted