While running PRC: Generate Draft Invoices for a Single Project request for generating draft invoice, I am getting rejection reason as NA under Draft Invoice Generation Eligibility Report.
Expenditures are available for billing when viewing under Expenditure Inquiry screen with Billable as 'Yes', Billing Hold 'No' and Billed 'No'.
Check the following:
Customer, and bill to address are active.
Funding is baselined and you are not violating hard limit fund control (meaning there is enough unbilled funding).
The top-tasks are marked as Ready to Bill (in Top Task Billing Control window)
The transactions are billable.
You have already run the Generate Draft Revenue and the expenditure items got distributed (they have RDLs - Revenue Distribution Lines).