Expene report not getting imported

Hi,

When ever an empoyee submitts an expense report with credit card expenses and cash expenses

2 invocies get created in Oracle  

1 for the bank(for credit card expenses) and other for the employee (for cash expenses)

 After running the expense report import for one of the expense reports we are not  getting the invoice  corrosponding to employee in oracle AP.

What are the interface tables,rejection tables where we can get this information for rejection?

Thanks

Ashish Joshi