Hi Ishana,
On the Vendor Transactions screen, the list of Payables transactions are based on the AP data file, and the Purchase Orders transactions are based on the PO data file. Because they are different data files, it is entirely possible for an invoice to appear on one list but not another.
If you cannot find the invoice when viewing the Payables transactions, I question that the AP invoice batch posted successfully. You mentioned that DIC was clean. If you view the receipt/invoice in PO, which vendor(s) are found on the Totals tab, where the vendor documents would originate from when Day End processing is run and the AP Invoice batches are created. Perhaps the invoice got created in AP for a different vendor code than you expected.
Since you know what the vendor document number is for the receipt/invoice from the PO data, perhaps you could do a search of that invoice number in the AP Transactions file to attempt to locate it there.
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Regards,
Softrak Tech Support