Hi all I hope that someone will help me whit this problem

Here is the situation: I use Oracle 9.2.0.1.0 Database and it works fine except one little thing.When I try to create view in my schema Oracle return error:

ORA-03113: End of file on comunnication channel
I know this error is not because of Net8 or Listener problem, usualy this error returns when some other error ocurs. I searched the internet and I find something about "two-task shadow processes" as possible problem. Can anybody help me with this. Here is the sample of creation script for this view:

CREATE OR REPLACE VIEW P2 AS
SELECT SUM(P.COLUMN_1) COLUMN_2, V.COLUMN_3, P.COLUMN_4
FROM VIEW1 P, VIEW2 V
WHERE TO_CHAR(P.COLUMN) = V.COLUMN
GROUP BY V.COLUMN_3,P.COLUMN_4;