no outstanding bill found for the ledger" 

Failed due to "no outstanding bill found for the ledger"

Merchant can  see this reason when bill by bill is not maintained in tally and against reference bills are not created.

Solution: Inform merchant to enable bill by bill and maintain data against reference for app to read exact outstanding

In Tally (TallyPrime or earlier versions like Tally ERP 9), "Bill by Bill" refers to a method of tracking outstanding invoices or bills payable/receivable individually. It is used in Accounts Receivable and Accounts Payable to track payments against specific invoices (bills), rather than lumping all transactions together. 

In Tally, “Against Reference” simply means linking a payment, receipt, or journal entry to an existing bill or voucher.