动画加载出错,求高手解决

浏览器里资源加载到97%时console出下面的错误

CCActionInterval.js:3326 Uncaught TypeError: Cannot read property ‘getRestoreOriginalFrame’ of null

startWithTarget:function (target) {
cc.ActionInterval.prototype.startWithTarget.call(this, target);
if (this._animation.getRestoreOriginalFrame())—>出错的就是这句
this._origFrame = target.displayFrame();
this._nextFrame = 0;
this._executedLoops = 0;
},

这是我的动画的加载方法,帧动画
cc.spriteFrameCache.addSpriteFrames(res.loading_plist);
var big=];
for (var si = 1; si<=10; si++){
var frameName1 =si + “.png”;
big.push(cc.spriteFrameCache.getSpriteFrame(frameName1));
}
var ani=cc.Animation(big,0.1);

    var sa2=cc.animate(ani);
    mainsprite.runAction(sa2.repeat(5));

把demo打包发上来~