Unable to create account for cancelled invoices

Hi,

I have a list of cancelled invoices which are appearing on the payables unaccounted report. On the Invoice workbench, the invoice status=cancelled, Accounting status=  Partial.

I raised an SR with oracle support but up to now, i have not received any response.

When i check on the distributions tab,there are some lines with status= Needs Revalidation and Accounted=Unprocessed. I am unable to validate the invoice since when i go to Actions tab, all the functions are disabled except create accounting, which when i click, i get a message that the invoice should be validated. These invoices are appearing on the Unaccounted Transactions Report (XML) with exception=