View not created while porting database from 11.4 to 11.8

After porting database (by script) from 11.4.2 into fresh new 11.8.6 database some of views were not recreated. That was because new system found an error in select while the old version runs the query fine. I've reduced the query to the minimum:

SELECT * from DP j

WHERE 

  not exists (

    select 0 from src

          where src.dp_id = j.dp_id 

    union all

    select 0 from dev

          where j.dp_id = src.dp_id

)

and it still output:

SQL Error (1054): Unknown column 'j.dp_id' in 'WHERE'
The essential is 'union all' construct. It runs without error If only the first or the second part in not exists subquery left.
That worked in Oracle, that worked in 11.4.2, not working in 11.8.6. Does it mean that such SQL statement isn't legal anymore?