UDATE urgente!!!

[Anônimo]

O ON ? fora do par?nteses

MERGE INTO T_I_TRANS IT
USING T_TRANS T
ON (IT.ID_TRANS = T.ID_TRANS)
WHEN MATCHED THEN
UPDATE SET IT.B_DEL = 1,
IT.B_COM = 1
WHERE T.NU_T_TRANS = p_n_t_trans;

Abra?o.