R12.1.3 - Paper Document Number is blank not using Payment Documents setup.

Hi,

We have 10 Operating Units(and LEs) with corresponding Internal bank accounts,

we are able to create one PPR to process the invoices from all the OUs, payments created and payment instruction generated correctly.

But the check numbers are not generated from the Payment Documents range setup and assigned to the Internal Bank account, i.e. iby_payments_all.paper_document_number is Blank.

we can't provide "Payment Document" value while creating the PPR, as system should use different range based on the Internal Bank Account used to create the payment

any pointers on how to make it work would be helpful?