roll20 API familiar summon (broken)

gistfile1.txt

// This script allows the players to summon their familiars. 
// When summoned, the familiar appears in their
// master's square.
on("chat:message", function(msg) {
    var cmdName = "!familiar";
    var msgTxt = msg.content;
    var curPageID = Campaign().get("playerpageid");
    
    // map of familiars to images.
    var familiarImages = {};
    familiarImages["Furret"] = "https://s3.amazonaws.com/files.d20.io/images/1409306/apzVimdgBQGGWh-f_7jurw/thumb.png?1373339440";
    
    
    if(msg.type == "api" && msgTxt.indexOf(cmdName) !== -1) {
        var selectedArray = msg.selected;
        
        for(var i in selectedArray) {
            var _id = selectedArray[i]._id;
            var masterToken = findObjs({id:_id, _pageid: curPageID})[0];
            
            var familiarName = "Furret";
            var familiarToken = findObjs({_pageid:curPageID, layer:"objects", name:familiarName})[0];
            
            if(familiarToken) {
                familiarToken.set("left", masterToken.get("left"));
                familiarToken.set("top", masterToken.get("top"));
            }
            else {
                familiarToken = createObj("graphic", 
                    {
                        _pageid:curPageID,
                        layer:"objects",
                        name:familiarName,
                        imgsrc:familiarImages[familiarName],
                        left:masterToken.get("left"),
                        top:masterToken.get("top"),
                        width:70,
                        height:70
                    }
                )
            }
        }
    }
});