Billing Management Tool - Receive message "Action Denied, Refresh your List" preventing the creation of invoice

QUESTION: I am receiving “Access Denied – Refresh Your List” on some files. I’ve generated invoices before on some of these files, so I don’t understand what is going on. Can you advise?

RESPONSE: Verify the "To" dates saved in the Details tab within the Billing Management filter to determine if the dates are not matching the dates of the entries in the invoices you are trying to create. For example if the "To" date is December 31, when the entries of the invoice you are trying to create are dated in January...  

Reselect the "To" dates and complete the fields and run the selection to save those dates and then go to the To Bill tab and try again.

You can also receive this message when selecting a request with no WIP having already an invoice created. You can verify that too by selecting the "View WIP Details" in the To Bill tab while the request is selected.