Error on Billing Export
Error Code: MAGENTO_ORDER_INVOICE_EXPORT_ERROR
Error Message: 'Magento Error occured during Order Invoice Export. Fault Code: 102 Fault String: Cannot do invoice for Order # XXXXXXX'
Reason: The Invoice already exists in Magento.
The Invoice was already exported or created manually in Magento. Either delete it from Magento DB or set the 'Magento Billing Sync Complete' checkbox on invoice/cashsale in NetSuite to 'true'.