Ultimate commit does not get made. Any ideas

Question

Hi Folks.
I have written the following program unit. This is fired from a WHEN-CHECKBOX-CHANGED trigger in my form.
If I happilly click a checkbox on and off several times the program unit works fine, making changes and then undoing them.
The only thing it does not do is make the final call to UPDATE_SESSION_LOG.
Eg.
If I check and uncheck the same checkbox 5 times then all the changes to the required tables are made correctly apart from the final call to UPDATE_SESSION_LOG which seems to get missed. Both program units are listed below.
Please post a reply with any sugggestions.
Cheers
Simon
PROCEDURE ASSIGN_UNASSIGN_PU_P IS
     v_check                               NUMBER(1);
     v_payment_ref                VARCHAR2(80);
     v_payment_date                DATE;
     v_payment_amount           NUMBER(12,4);
     v_payment_currency      CHAR(3);
     v_payment_status           NUMBER(1);
     v_invoice_number          CHAR(18);
     v_running_total               NUMBER(12,4);
     v_user                                   CHAR(10);
BEGIN
     v_check := NULL;
     v_check := :POSITION_ASSIGN_CANDIDATE.ASSIGNED;
     v_user := GET_APPLICATION_PROPERTY(USERNAME);
     IF v_check = 1 THEN -- Invoice marked as paid
          v_payment_ref                := :POSITION_ASSIGN_SUMMARY.PAYMENT_REF;
          v_payment_date                := :POSITION_ASSIGN_SUMMARY.PAYMENT_DATE;
          v_payment_amount           := :POSITION_ASSIGN_SUMMARY.PAYMENT_AMOUNT;
          v_payment_currency      := :POSITION_ASSIGN_SUMMARY.PAYMENT_CURRENCY;
          v_payment_status           := 1;
          v_invoice_number          := :POSITION_ASSIGN_CANDIDATE.UCL_INVOICE_NO;
          UPDATE SETTLEMENTS
          SET PAYMENT_REFERENCE = v_payment_ref,
                    PAYMENT_DATE = v_payment_date,
                    PAYMENT_AMOUNT = v_payment_amount,
                    PAYMENT_CURRENCY = v_payment_currency,
                    PAYMENT_STATUS = v_payment_status
          WHERE UCL_INVOICE_NO = v_invoice_number;
          :SCB_TRANSACTIONS.PROCESSING_STATUS := 2;
          :CONTROL.TOTAL_SELECTED := :CONTROL.TOTAL_SELECTED + :POSITION_ASSIGN_CANDIDATE.UCL_INVOICE_AMOUNT;
          SYNCHRONIZE;
          COMMIT;     
          UPDATE_SESSION_LOG('Assigned', 'Ref '||SUBSTR(:POSITION_ASSIGN_SUMMARY.PAYMENT_REF,1,65), v_invoice_number, SUBSTR(v_invoice_number,1,5), SUBSTR(v_invoice_number,7,5), v_user, SYSDATE, NULL);
     ELSIF v_check = 0 THEN -- Invoice being marked as unpaid;
               v_payment_ref                := NULL;
               v_payment_date                := NULL;
               v_payment_amount           := NULL;
               v_payment_currency      := NULL;
               v_payment_status           := 0;
               v_invoice_number          := :POSITION_ASSIGN_CANDIDATE.UCL_INVOICE_NO;
          UPDATE SETTLEMENTS
          SET PAYMENT_REFERENCE = v_payment_ref,
                    PAYMENT_DATE = v_payment_date,
                    PAYMENT_AMOUNT = v_payment_amount,
                    PAYMENT_CURRENCY = v_payment_currency,
                    PAYMENT_STATUS = v_payment_status
          WHERE UCL_INVOICE_NO = v_invoice_number;
          :SCB_TRANSACTIONS.PROCESSING_STATUS := 1;
          :CONTROL.TOTAL_SELECTED := :CONTROL.TOTAL_SELECTED - :POSITION_ASSIGN_CANDIDATE.UCL_INVOICE_AMOUNT;
          SYNCHRONIZE;
          COMMIT;
          UPDATE_SESSION_LOG('Unassigned', 'Ref '||SUBSTR(:POSITION_ASSIGN_SUMMARY.PAYMENT_REF,1,65), v_invoice_number, SUBSTR(v_invoice_number,1,5), SUBSTR(v_invoice_number,7,5), v_user, SYSDATE, NULL);
          END IF;
END;
PROCEDURE update_session_log (module varchar2, description varchar2, invoice_no char, pmn char, p_pmn char, aUser char, aDate DATE, period char) IS
     the_user          varchar2(10);
     the_date          DATE;
BEGIN
     the_user     := Get_Application_Property(USERNAME);
     the_date     := SYSDATE;
INSERT
     INTO OPS_LOG_SESSION
     VALUES
               module,
               description,
               invoice_no,
               pmn,
               p_pmn,
          the_user,
               the_date,
               period
          COMMIT;

Answer 1

Hey Lozzerg,
Thanks for the question. I understand that you are having issues send email on your iPad Air. The following resource outlines troubleshoot steps that may lead to a resolution:
iOS: Troubleshooting Mail
http://support.apple.com/kb/TS3899
Thanks,
Matt M.