HELP scheduling a job to run within a window

Hi,
I am trying to create a job that can only run at certain times of the day. Since I will be creating a lot of these jobs (each of which will run once), I thought I could use a window to define when this job runs. As a test, I tried the following:
begin
   dbms_scheduler.create_window(
      window_name => 'TEST_WINDOW',
      resource_plan => null,
      repeat_interval => 'FREQ=DAILY',
      duration => INTERVAL '24' hour,
      window_priority => 'LOW'
   dbms_scheduler.create_job(
      job_name => 'TEST_WINDOW_JOB',
      job_type => 'PLSQL_BLOCK',
      job_action => 'BEGIN NULL; END;',
      schedule_name => 'SYS.TEST_WINDOW',
      enabled => true );
end;
/But this doesn't work as expected.
1) all_scheduler_windows shows that TEST_WINDOW is not ACTIVE. However, if I try to explicitly open the window with DBMS_SCHEDULER.OPEN_WINDOW, I get an error saying the window is currently open.
2) The job is created, but its STATE is set to SCHEDULED and it doesn't run even though the window is open and the job is enabled. (I also tried creating a job using a window that was ACTIVE in all_scheduler_windows and got the same results).
Can anyone point out what I am doing wrong here?
Thank you,
Eric

Hi Eric,
Two things.
1) You can have a schedule which repeats once an hour (or even once a minute) from 8pm till 7am and then point all your jobs to this schedule. You will need to set max_runs for the jobs to 1 before enabling them. So they will only run on the given schedule and only once. A possible repeat interval for the schedule is :
freq=minutely;bysecond=0;byhour=20,21,22,23,0,1,2,3,4,5,6,7;byday=MON,TUE,WED,THU,FRI
2) By default, the database comes with several pre-created windows and a MAINTENANCE_WINDOW_GROUP . This window group is supposed to be user-modified to periods where it is ok to do maintenance tasks. You may be able to point your jobs to this window group or one of its windows, if you want your jobs to run during this period.
Hope this helps,
Ravi.

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