Ethereum: Vertragsfunktion mit bytes32-Array aufrufen

Ich habe die folgende Vertragsfunktion

    function voteForAnswer(bytes32 questionKey, bytes32[] answerKeys)
     returns (bool success)
{
    // is the sender allowed to do this?
    if (voters[msg.sender].enabled == false) {
        throw;
    }
    // TODO: check for question existence;
    if (questions[questionKey].alreadyVoted[msg.sender] == true) {
        throw;
    }
    questions[questionKey].alreadyVoted[msg.sender] = true;
    for (uint i; i <= answerKeys.length; i++) {
        questions[questionKey].answers[answerKeys[i]].voteCount += 1;
        VoterVotedFor(msg.sender, questionKey, answerKeys[i]);
    }
}

Wie kann ich die Vertragsfunktion aufrufen?

aktuell bekomme ich folgende Mist-Meldung

Was mache ich falsch?

Danke Thomas

AKTUALISIEREN

Ich habe meinen Vertrag so angepasst, dass ich in meiner Funktion VoteForAnswer kein Array mehr verwende; Ich bekomme immer noch einen Fehler:

pragma solidity ^0.4.0;

contract owned {
    address public owner;

    function owned() {
        owner = msg.sender;
    }

    modifier onlyOwner {
        if (msg.sender != owner) throw;
        _;
    }

    function transferOwnership(address newOwner) onlyOwner {
        owner = newOwner;
    }
}

contract Roadshow is owned {

    bytes32 public text;  // shortname (up to 32 bytes)
    uint public start; // datetime when roadshow starts
    uint public end;   // datetime when roadshow ends
    mapping(address => Voter) public voters;

    struct Voter {
        bool enabled;  // if true, that person is currently allowed to vote
    }

    struct Answer
    {
        bytes32 text;
        uint voteCount; // number of accumulated votes
        // add more non-key fields as needed
    }

    struct Question
    {
        bytes32 text;
        mapping(bytes32 => Answer) answers; // random access by question key and answer key
        bytes32[] answerList; // list of answer keys so we can look them up
        // add more non-key fields as needed
        mapping(address => bool) alreadyVoted;
      }

    mapping(bytes32 => Question) questions; // random access by question key
    bytes32[] questionList; // list of question keys so we can enumerate them

    function Roadshow(bytes32 _name) {
        text = _name;
        start = now;
        voters[msg.sender].enabled = true;
    }

    function addQuestion(bytes32 questionKey, bytes32 text)
        onlyOwner
        returns(bool success)
    {
        // not checking for duplicates
        questions[questionKey].text = text;
        questionList.push(questionKey);
        return true;
    }

    function getQuestion(bytes32 questionKey)
        public
        constant
        returns(bytes32 wording, uint answerCount)
    {
        return(
            questions[questionKey].text,
            questions[questionKey].answerList.length);
    }

    function addAnswer(bytes32 questionKey, bytes32 answerKey, bytes32 answerText)
        onlyOwner
        returns(bool success)
    {
        questions[questionKey].answerList.push(answerKey);
        questions[questionKey].answers[answerKey].text = answerText;
        // answer vote will init to 0 without our help
        // questionStructs[questionKey].answerStructs[answerKey].voteCount = 0;

        return true;
    }

    function getQuestionAnswer(bytes32 questionKey, bytes32 answerKey)
        public
        constant
        returns(bytes32 answerText, uint answerVoteCount)
    {
        return(
            questions[questionKey].answers[answerKey].text,
            questions[questionKey].answers[answerKey].voteCount);
    }

    function getQuestionAnswerText(bytes32 questionKey, bytes32 answerKey)
        public
        constant
        returns(bytes32 answerText)
    {
        answerText = questions[questionKey].answers[answerKey].text;

        return answerText;
    }

    function getQuestionAnswerCount(bytes32 questionKey, bytes32 answerKey)
        public
        constant
        returns(uint answerCount)
    {
        answerCount = questions[questionKey].answers[answerKey].voteCount;

        return answerCount;
    }

    function getQuestionCount()
        public
        constant
        returns(uint questionCount)
    {
        return questionList.length;
    }

    function getQuestionAtIndex(uint row)
        public
        constant
        returns(bytes32 questionkey)
    {
        return questionList[row];
    }

    function getQuestionAnswerCount(bytes32 questionKey)
        public
        constant
        returns(uint answerCount)
    {
        return(questions[questionKey].answerList.length);
    }

    function getQuestionAnswerAtIndex(bytes32 questionKey, uint answerRow)
        public
        constant
        returns(bytes32 answerKey)
    {
        return(questions[questionKey].answerList[answerRow]);
    }

    // in Ethereum we cannot pass dynamically sized arrays
    // function voteForAnswer(bytes32 questionKey, bytes32[] answerKeys)
    function voteForAnswer(bytes32 questionKey, bytes32 answerKey)
         returns (bool success)
    {
        // is the sender allowed to do this?
        if (voters[msg.sender].enabled == false) {
            throw;
        }
        // TODO: check for question existence;
        if (questions[questionKey].alreadyVoted[msg.sender] == true) {
            throw;
        }

        questions[questionKey].alreadyVoted[msg.sender] = true;
        questions[questionKey].answers[answerKey].voteCount += 1;
        VoterVotedFor(msg.sender, questionKey, answerKey);

        return true;
    }

    function addVoter(address _voter)
        onlyOwner
        returns (bool success)
    {
        voters[_voter] = Voter(true);
        VoterAdded(_voter, this.text());
        return true;
    }

    event VoterAdded(address _newVoter, bytes32 _questionKey);
    event VoterVotedFor(address _voter, bytes32 _questionKey, bytes32 _answerKey);
}