Reports & Discoverer :: Modify REP File

I am working on Oracle reports 6i. Just for R&D purpose I have opened REP file in notepad. In the notepad file I could find the queries which are there in the data model.

I did a small addition to the query and saved it in the same location. I tried to open the modified REP file from RWRUN60, but it is throwing me error saying "REP-0110- Unable to open file".

Original Query in data model:
SELECT empno, sal, job, hiredate
FROM emp;

Modified Query:
SELECT empno, sal, job, hiredate
FROM emp
WHERE deptno in (10,30);