调用合约方法时Error: invalid address

1 问题出现路径

1.1 创建智能合约

pragma solidity ^0.4.17;
contract SimpleStorageContract{
    uint a;
    function setVal(uint b) public{
        a = b;
    }
    function getVal() public constant returns (uint){
        return a;
    }
}

1.2 使用truffle部署智能合约

var SimpleStorageContract = artifacts.require("./SimpleStorageContract.sol");
module.exports = function(deployer) {
  deployer.deploy(SimpleStorageContract, {gas:460000, from:"0xaaa5110d4d02b4daad52e0d1679e4e0f36c889fc"});
};

truffle migrate --reset

1.3 创建合约对象

var abi = [];
var simpleStorage = web3.eth.contract(abi).at(adress_of_contract);
simpleStorage.setVal(1);

2 问题

Error: invalid address

3 解决办法

eth.defaultAccount=eth.coinbase;