Uncaught Error: new BigNumber() not a base 16 number (I know it might be the known bug)

Question

I run into the uncaught error: new BigNumber() not a base 16 number. It's been discussed here and might occur due to a bug in web3.js

Maybe it's just my code that causes this error. Here it is:

pragma solidity ^0.4.8;
contract Test {
    struct Addresses{ 
        string  id;
        string[] fname;
        string[] lname;
        string[] streetaddress;
        string[] zip;
    } 
    mapping(string => Addresses) UserProfile;

    //Set Variables
    function setData(string uid,string firstname,string lastname,string street,string zipVal) { 
        UserProfile[uid].id = uid;
        UserProfile[uid].fname.push(firstname);
        UserProfile[uid].lname.push(lastname);
        UserProfile[uid].streetaddress.push(street);
        UserProfile[uid].zip.push(zipVal);
    }

    //Return Variables
    function getFirstname(string uid, uint8 pos) constant returns (string) {
        return UserProfile[uid].fname[pos];
    }
    function getLastname(string uid, uint8 pos) constant returns (string) {
        return UserProfile[uid].lname[pos];
    }
    function getGender(string uid, uint8 pos) constant returns (string) {
        return UserProfile[uid].streetaddress[pos];
    }
    function getDOB(string uid, uint8 pos) constant returns (string) {
        return UserProfile[uid].zip[pos];
    }
}

and here is my Javascript:

function getUserProfile() {
    var struid = document.getElementById('uid').value;
    var iPos = parseInt("0");
    returnFirstname = UserProfile.getFirstname(struid, iPos);
    returnLastname = UserProfile.getLastname(struid, iPos);
    //OUTPUT TO CONSOLE
    console.log("-----------------");
    console.log("GET DATA FUNCTION");
    console.log("UID: "+struid);
    console.log("Pos: "+iPos);
    //OUTPUT TO HTML
    document.getElementById('firstname').innerHTML = returnFirstname;
    document.getElementById('lastname').innerHTML = returnLastname;
}

Maybe it's the combination of strings and integers that is throwing this error.

Any pointer would help! Thanks

Answer 1

Base 16 is hexadecimal. The variable iPos you're giving to getFirstname is base 10 IE "0"

Hexademical is 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F <-- Sixteen positions.

Demical is 0,1,2,3,4,5,6,7,8,9 <-- Ten positions.

The number zero in Base 16 is 0x0.

Answer 2

finally found out why I was getting this problem. First of all, when passing on an integer, I got an error which I could counter with converting it to hex. But more importantly I found out that the BigNumber error is thrown when:

• I tried to "query" a transaction that was created by another contract e.g. not the current version. Don't ask me why, just an observation
• I queried a position that was not existing. Like for instance if there was nothing pushed...

Maybe this will help someone running into the same issue.

B