ASP - Error ORA-00936:missing expression

Hola a todos...

Estoy intentando correr este script pero me marca el error ORA-00936:missing expression

INSERT INTO C90OC.PS_RC_SOLUTION ( SETID, SOLUTION_ID, RC_SOLUTION_TYPE, SOLN_STATUS, RC_SOLN_VISIBILITY, RC_SUMMARY, SYMPTOM_DESCR, KEYWORDS, LAST_ACTION_DTTM, EXPIRY_IND, EXPIRY_DATE, EXPIRY_REASON, NEW_SOLUTION_ID, LIBRARY_ID, USAGE_COUNT, LAST_USAGE_DTTM, USER_UPDATE_DTTM, UPDATED_BY_USER, RC_SOLVED_COUNT, FAQ_FLAG, URL, ROW_ADDED_DTTM, ROW_ADDED_OPRID, ROW_LASTMANT_DTTM, ROW_LASTMANT_OPRID, SYNCID, SYNCDTTM, SOLUTION_DESCR)
VALUES (
'BO001',
(UPDATE PS_RC_LAST_NBR_TBL SET RC_LAST_NBR=(SELECT max(RC_LAST_NBR)+1 FROM PS_RC_LAST_NBR_TBL
WHERE RC_LAST_NBR_TYPE = 'SOLN')),
'ADHC',
'DRFT',
'A',
'Se cierra por TI en solicitud a IM457912.',
' ', ' ',
NULL, 'N',
NULL, ' ', 0, ' ', 1,
to_date('20-06-2011 12:00:00','dd-mm-yyyy hh24:mi:ss'),
to_date('20-06-2011 12:00:00','dd-mm-yyyy hh24:mi:ss'),
'SRC999999', 1, 'N', ' ',
to_date('20-06-2011 12:00:00','dd-mm-yyyy hh24:mi:ss'),
'SRC999999',
to_date('20-06-2011 12:00:00','dd-mm-yyyy hh24:mi:ss'),
'SRC999999', 0,
NULL,
'Se cierra por TI en solicitud a IM457912.')


He corrido la subconsulta del update por separado y no genera ningun error, el problema es al anidarlo.... Agradezco si pueden colaborarme

Saludos!