If the Accounting Period list is empty this is not an error. Please verify if:
for an Interim Payment Application:
- the DOA has been sent (in time for the current Accounting Period),
- a previous Interim Payment Application is not 'Open',
- the Final Payment for the previous required Accounting Period has been sent,
- the Final Payment Application for the current Accounting Period does not exist yet,
- the Interim Payment Application can be created until the 30/06/ of year N.
for a Final Payment Application:
- the DOA has been sent,
- all existing versions (last working version) are 'Sent' to the Commission, 'Cancelled', 'Fully Rejected by EC' or 'Accepted by EC',
- the Final Payment Application for the current Accounting Period does not exist yet,
- the Final Payment can be created between 1/07/N and 31/07/N.