Before 60 days mass payment file
The commissions will not be available in the mass pay file until 60 days after the purchase date of the products. You will want to wait until the release date is 60 days prior, and then the commissions will be available to manually release.
After 60 days
If you look through your detailed sales stats, you will be able to see all of the incomplete sales. Those are the ones that have not yet been paid to the affiliates.