Purchase Order Posting.

For invoice Transaction will have vouchers.

Vouchers have VoucherNo. This Voucher NO are not NumSEq. how this is generating where Vouchers are inserting.

What basis Vouchers are inserting…

Voucher No is also a Number Sequence based.

Look into PurchFormLetter_Invoice → AllocateNumAndVoucher method

add even you can find more detail by debugging the code…

Thanks For your Great Support