Missing invoice

I just entered an invoice from our supplier now. After entering all their invoices, I reconcile with their statement, somehow one of the invoices I just entered is not showing up in MYOB. So i thought maybe I missed it out, but when i try to enter the invoice again the warning message shows saying that this invoice has already been entered. But when i check the purchase register i cannot find this invoice anywhere. I searched using the invoice number, no luck, searched using the Purchase No - still no luck. I widened the dates to search in - no luck

Please help. I seem to encountering a lot of problems with MYOB accountright nowadays