AsyncMessage.readExternal indexOutOfBounds

Question

I hava a java service that uses custom serialization to return a list of address objects, but I'm having problems de-serializing the list in my Flex app. I have been able to use my other services that return Arraylists of other VOs with no problem, but I can't see what I'm doing differently here.
The actual error I get is
RangeError: Error #2006: The supplied index is out of bounds.
    at ObjectInput/readObject()
    at mx.messaging.messages::AsyncMessage/readExternal()[E:\dev\3.1.0\frameworks\projects\rpc\s rc\mx\messaging\messages\AsyncMessage.as:176]
    at mx.messaging.messages::AcknowledgeMessage/readExternal()[E:\dev\3.1.0\frameworks\projects \rpc\src\mx\messaging\messages\AcknowledgeMessage.as:77]
Debugging I can see that my list is returned with an address as expected -
this    mx.messaging.messages.AcknowledgeMessageExt (@af6c711)   
    [inherited]   
        body    com.somepackage.params.GetValidAddressResponseParameter (@aee9461)   
        _body    com.somepackage.params.GetValidAddressResponseParameter (@aee9461)   
            AddressList    Array (@af3b319)   
            _addressList    Array (@af3b319)   
                [0]    com.somepackage.classes.AddressVO (@af515f1)   
                length    1   
        clientId    null   
        _clientId    null   
        clientIdBytes    null   
        correlationId    ""   
        _correlationId    ""   
        correlationIdBytes    null   
        destination    ""   
        _destination    ""   
        headers    Object (@af205d9)   
        _headers    null   
        messageId    "334E79FE-2C0D-E499-1ED1-71DD00EE3AA3"   
        _messageId    "334E79FE-2C0D-E499-1ED1-71DD00EE3AA3"   
        messageIdBytes    null   
        timestamp    0   
        _timestamp    0   
        timeToLive    0   
        _timeToLive    0   
    _message    null   
input    ObjectInput (@aee9b81)   
    bytesAvailable    36 [0x24]   
    endian    "bigEndian"   
    objectEncoding    3   
flagsArray    Array (@af3b389)   
i    0   
flags    12 [0xc]   
reservedPosition    2   
j    2   
The error is being thrown in AsyncMessage.readExternal -
override public function readExternal(input:IDataInput):void
        super.readExternal(input);
        var flagsArray:Array = readFlags(input);
        for (var i:uint = 0; i < flagsArray.length; i++)
            var flags:uint = flagsArray[i] as uint;
            var reservedPosition:uint = 0;
            if (i == 0)
                if ((flags & CORRELATION_ID_FLAG) != 0)
                    correlationId = input.readObject() as String;
                if ((flags & CORRELATION_ID_BYTES_FLAG) != 0)
                    correlationIdBytes = input.readObject() as ByteArray;
                    correlationId = UIDUtil.fromByteArray(correlationIdBytes);
                reservedPosition = 2;
            // For forwards compatibility, read in any other flagged objects
            // to preserve the integrity of the input stream...
            if ((flags >> reservedPosition) != 0)
                for (var j:uint = reservedPosition; j < 6; j++)
                    if (((flags >> j) & 1) != 0)
                       input.readObject();
Can anyone suggest where I'm going wrong?
Thanks

Answer 1

I must have fixed it as I wasn't getting the problem - but I don't have access to the code as I've left the company where I encountered this.
I don't remember doing anything huge to get round this - have you checked that your serializtion/deserialization on each end are the same (i.e. that properties are written out/read in in the same order + have 'matching' types)?