ppms missing

SELECT PPMS_TRX_REF_MIN - 1 + LEVEL
FROM (SELECT
        MIN(SUBSTR(transaction_reference,LENGTH(transaction_reference)-5,9999)) PPMS_TRX_REF_MIN,
        MAX(SUBSTR(transaction_reference,LENGTH(transaction_reference)-5,9999)) PPMS_TRX_REF_MAX
FROM
mtl_material_transactions mmt
WHERE 1=1
AND TRUNC(transaction_date) = TRUNC(TO_DATE('2018-08-08','YYYY-MM-DD'))
--and transaction_Reference like '%FIM%233684'
AND mmt.transaction_source_type_id = 120
--and transaction_id = 227030600
AND mmt.organization_id = 82)
CONNECT BY LEVEL <= PPMS_TRX_REF_MAX - PPMS_TRX_REF_MIN + 1
MINUS
(SELECT DISTINCT
        TO_NUMBER(SUBSTR(transaction_reference,LENGTH(transaction_reference)-5,9999)) PPMS_TRX_REF
FROM
mtl_material_transactions mmt
WHERE 1=1
AND TRUNC(transaction_date) = TRUNC(TO_DATE('2018-08-08','YYYY-MM-DD'))
--and transaction_Reference like '%FIM%233684'
AND mmt.transaction_source_type_id = 120
--and transaction_id = 227030600
AND mmt.organization_id = 82
)
;