ORA-02297: cannot disable constraint

Following query will check dependent table and the dependent constraint name.
After that disable child first and then parent constraint.

SELECT p.table_name "Parent Table", c.table_name "Child Table",
p.constraint_name "Parent Constraint", c.constraint_name "Child Constraint"
FROM user_constraints p
JOIN user_constraints c ON(p.constraint_name=c.r_constraint_name)
WHERE (p.constraint_type = 'P' OR p.constraint_type = 'U')
AND c.constraint_type = 'R' AND p.table_name = UPPER('&table_name')
/

Parent Table                   Child Table                    Parent Constraint              Child Constraint
------------------------------ ------------------------------ ------------------------------ ------------------------------
CFA_ATTRIB                     CFA_ATTRIB_LABELS              PK_CFA_ATTRIB                  CFAAL_CFA_FK