What does the error message 'NumberSeriesDoesNotExist' mean? September 19, 2019 08:21 Updated Follow If you get his error message then no voucher number series has been created in the company. Read about how to set up a number series here. Related articles Why can't I enter a decimal in the item amount in my order lines? My user has been delayed by '1,2,3...' and I have (do not have) extra server calls. Why can't I see a menu item or button i Uniconta? Why do I get an error message 'No lines for posting' in my journal?