Issue -- Not able to create fusion payable Invoice

Issue: You cannot enter the invoice lines because the invoice header is incomplete. Enter the required information in the invoice header before entering the lines.

   

Analysis: This error was coming even after providing all details in invoice header.  From error message there seemed to be no link between error and accounting period.

But Accounting period was not opened for the accounting date which was the cause behind this error. After opening accounting period, error got resolved.