Unhandled Error!

Trying to get property of non-object

Document	product_partial
Document type	CMS partial
Line	4
Exception class	Cms_ExecutionException

Code Highlight

<?= open_form(array('id'=>'productForm')) ?>
 
  <div id="vendorIntro">
    <a class="vendorView" href="/shop/vendor/<?= $product->manufacturer->url_name; ?> ">View all <?= $product->manufacturer->name; ?> products</a>
 
 
    <a class="vendorLogo title" href="/shop/vendor/<?= $product->manufacturer->url_name; ?> " style="background:url(<?= h($product->manufacturer->logo_url('auto', '60')) ?>) center right no-repeat transparent;"><?= $product->manufacturer->name; ?></a>
 
  </div>
 
  <div id="productDisplay">
    <? // $this->render_partial('shop:image_overlay', array('images'=>$product->images)) ?>
    <? $this->render_partial('shop_image_set', array('images'=>$product->images)) ?>

#	Document	Type
2	product_partial	CMS partial
1	Product	CMS page