1. Go to Maintenance | General | Object types | select Oracle apps setup object from the drop down list
2. Locate the object type Aol Report Request Group Unit and pay attention to the default migr order column. Make sure it is not null. If it is, then follow step 3.
3. Take a good back-up of the stat schema and re-run the statrk_fnd.sql
4. Bounce the stat oracle agent