NZE-28809: Cannot delete information from the data source.
What triggered the Error:
The system or application failed to delete information from the data source (file or database).What should we do to fix it:
Enable Oracle Net tracing to determine the exact error.
If this was not sufficient go over to:
Oracle Official Support Knowledge Center
Or maybe those geeks at: StackOverflow Board
Or maybe those geeks at: StackOverflow Board