Dear Reddy,
As far as I can think of, the following needs to be pay attention to:
1. If an object has parent objects, it should be loaded after the parent objects are loaded. Otherwise, there will be an error "parent not ok".
For example, for object material, you can see it has 2 parent customizing objects DNL_CUST_PROD0 and DNL_CUST_PROD1.
2. Initial load of object "MATERIAL" should be performed before condition master records are loaded.
Otherwise, the condition records which contain material numbers cannot be updated.
For objects which do not have much relation, it does not matter which one is loaded first.
Best Regards,
Ellen