"Missing or Invalid Header" when deleting Cash receipts entry batch.

Hello, 

Today I had someone want to delete a batch that was entered into A/R cash receipts entry. When I try to delete it, a pop up box says "Missing or Invalid Header," and I am not allowed to delete the batch. I have seen this error before while importing records through a VI job, but never when trying to delete. It would be nice to know what is causing this, but all we really care about now is how to delete this batch. 

Thanks!