Lightyear has a ton of built in validation checks to ensure the data is correct in Lightyear before trying to send the bill and information to Access Financials.
However, there are occasions when the export fails and Lightyear displays the reason for the error - you will see a warning message with information like the below, directing you to view the document's Activity History.
Please ensure the Amount is greater than or less than zero for all line items
You may have a line on the document that has an amount of 0.00 - you will need to remove these to allow this document to export.
Due date cannot be before transaction date
The due date on the document falls before the invoice date - please adjust this accordingly so the due date is after the invoice date.
ISO Code is invalid, Supplier currency [XXX] does not match transaction currency , One or more specified analysis codes have a different currency to the transaction
The document currency in Lightyear doesn't match the Supplier currency in Access Financials, e.g. Lightyear may be USD where Access Financials is GBP. You will need to either update the Lightyear document, or enable the Access Financials Supplier to allow for Any Currency in Settings