I have a problem trying to make a transaction using bitcoind/bitcoin-cli in regtest mode (I do not know if it works in other modes).

bitcoin-cli -regtest createrawtransaction '[{"txid" : "e5db3c4fd05d1b8f979de45aca1ebb78b4bd356920cc07b9f374d8c9838d4b5a","vout":0}]' '{"misCfm4sZJDsU3uYHp9NrUZjH3y5rgHrJx":5}'
-> 01000000015a4b8d83c9d874f3b907cc206935bdb478bb1eca5ae49d978f1b5dd04f3cdbe50000000000ffffffff010065cd1d000000001976a91424bcb21358f61d207207c1cb01921ab602948b9488ac00000000

bitcoin-cli -regtest signrawtransaction 01000000015a4b8d83c9d874f3b907cc206935bdb478bb1eca5ae49d978f1b5dd04f3cdbe50000000000ffffffff010065cd1d000000001976a91424bcb21358f61d207207c1cb01921ab602948b9488ac00000000
-> {
"hex" : "01000000015a4b8d83c9d874f3b907cc206935bdb478bb1eca5ae49d978f1b5dd04f3cdbe5000000006b483045022100c4c38395683460872f35971fb808a3a28f4d0e16793739760265af6339078a5a02201e5b960e3a97102797282ddb421edca84869ad296da145e55e00dcae747c7c4701210227b858d4f7f75e26ce370e3c0b862e4b9518da6f9cc6d4012008d9b829db9003ffffffff010065cd1d000000001976a91424bcb21358f61d207207c1cb01921ab602948b9488ac00000000",
**"complete" : true**
}

bitcoin-cli -regtest sendrawtransaction 01000000015a4b8d83c9d874f3b907cc206935bdb478bb1eca5ae49d978f1b5dd04f3cdbe5000000006b483045022100c4c38395683460872f35971fb808a3a28f4d0e16793739760265af6339078a5a02201e5b960e3a97102797282ddb421edca84869ad296da145e55e00dcae747c7c4701210227b858d4f7f75e26ce370e3c0b862e4b9518da6f9cc6d4012008d9b829db9003ffffffff010065cd1d000000001976a91424bcb21358f61d207207c1cb01921ab602948b9488ac00000000
-> **error: {"code":-25,"message":""}**

I have had a look at the bitcoind source code. From rpcrawtransaction.cpp:

if (!AcceptToMemoryPool(mempool, state, tx, false, NULL, !fOverrideFees)) {
        if(state.IsInvalid())
            throw JSONRPCError(RPC_TRANSACTION_REJECTED, strprintf("%i: %s", state.GetRejectCode(), state.GetRejectReason()));
        else
            throw JSONRPCError(RPC_TRANSACTION_ERROR, state.GetRejectReason());
    }

So the state.IsInvalid() method returns false but the state.getRejectedReason() returns empty string.

More in depth, it seems to be that such problems may arise if:

1. The tx is already in the memory pool (mah)
2. Disable replacement feature for now (boh)
3. I have already the coins
4. Some inputs do not exist

I am changing the source code to log the reason of my error. Meanwhile, any help would be greatly appreciated.

Thank you.