Problems with Snapshot (ORACLE 8.1.5)

Hi!

I try to create a Snapshot with the following statement:

create snapshot SNAPSHOT_NAME
storage (initial 100K next 100K pctincrease 0) tablespace SYSTEM
refresh complete
start with TO_DATE('11/18/2001 2:00', 'MM/DD/YYYY HH24:MI') next TO_DATE('11/18/2001 2:00', 'MM/DD/YYYY HH24:MI') + 7 with ROWID
as select * from TABLE_NAME_at_DB_LINK;

I get the following error-message:

ORA-01435: user does not exist
ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 870
ORA-06512: in Zeile 1

Can someone help me?

Thanks

--
André Klos