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Error: "Duplicate Invoice encountered. Invoice # must be unique"

Created on  | Last modified on 

Summary

When printing invoices in Sage 300 CRE Billing, I receive the error "Duplicate Invoice encountered. Invoice # must be unique when the invoice number already exists in Accounts Receivable".

Cause

The AR Settings don't have the Allow Duplicate Invoices option selected.

Resolution

Enable duplicate invoice numbers.

  1. Go to Accounts Receivable, File, Company Settings, AR Settings, Entry Settings.
  2. Check the Allow duplicate invoices box to turn the option on.
  3. If you enable the option for one invoice, uncheck it after completion.