“Unable to find a matching line for sublist apply with key: [doc,line].”-error in CSV file for customer payment.

To resolve the import issue,

1. ensure that the payment being imported is applied to a transaction without a “Paid in Full” status, necessitating an “Open” status for the associated invoice.
2. It is essential to include an external ID in the CSV file being imported.
3. Assign the LINE ID as 0 for the relevant transaction in the CSV file.
4. Verify that the payment amount being imported doesn’t exceed the remaining balance of the transaction.