Advance the Ledger in Stand-Alone Mode
In stand-alone mode, rippled does not communicate to other members of the peer-to-peer network or participate in a consensus process. Since there is no consensus process in this mode, you must manually advance the ledger index using the ledger_accept method:
rippled ledger_accept --conf=/path/to/rippled.cfg
In stand-alone mode, rippled makes no distinction between a "closed" ledger version and a "validated" ledger version. (For more information about the difference, see The XRP Ledger Consensus Process.)
Whenever rippled closes a ledger, it reorders the transactions according to a deterministic but hard-to-game algorithm. (This is an important part of consensus, since transactions may arrive at different parts of the network in different order.) When using rippled in stand-alone mode, you should manually advance the ledger before submitting a transaction that depends on the result of a transaction from a different address. Otherwise, the two transactions might be executed in reverse order when the ledger is closed.
Note: You can safely submit multiple transactions from a single address to a single ledger, because rippled sorts transactions from the same address in ascending order by Sequence number.