What database version? What is your setting for O7_DICTIONARY_ACCESSIBILITY?
I tried the following in an 8.1.7 database with O7_DICTIONARY_ACCESSIBILITY = FALSE

create user x identified by ... ;
grant create session, create trigger to x ;

(logging on as SYSDBA)
grant execute on sys.dbms_support to x ;

CONNECT X ...
create trigger schema_trace
after logon
on schema
begin
   sys.dbms_support.start_trace (waits => false, binds => false) ;
end ;
/
DISCONNECT

logon as user X:
trace file created

logon as user Y:
no trace file created

logon as user Y, say "alter sesssion set current_schema = X ;"
no trace file created

No error messages in alert log

> -----Original Message-----
> From: Paul Baumgartel [mailto:[EMAIL PROTECTED]
> 
> In an attempt to catch all SQL issued by a report, I created a logon
> trigger in the report's logon schema.  (As SYS, I granted the user
> EXECUTE on DBMS_SESSION before creating the trigger.)  As the schema
> owner, I am able to execute DBMS_SESSION.SET_SQL_TRACE interactively.
> 
> On logon, trace files are created, but they contain the following:
> 
> *** SESSION ID:(27.4739) 2003-07-22 18:52:53.000
> Skipped error 604 during the execution of RPT_PERF.TRACE_ALL 
> *** 2003-07-22 18:52:53.000
> ksedmp: internal or fatal error
> ORA-00604: error occurred at recursive SQL level 1
> ORA-01031: insufficient privileges
> ORA-06512: at "SYS.DBMS_SESSION", line 126
> ORA-06512: at line 2
> 
> 
> When SQL statements are executed in the session, no further trace
> information is added to the file.
> 
> Anyone know what's going on here?
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Jacques Kilchoer
  INET: [EMAIL PROTECTED]

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