Unhandled Error!

Trying to get property of non-object

Document shop:product_partial
Document type CMS partial
Line 19
Exception class Cms_ExecutionException

Code Highlight

        <!-- Product Attributes -->
        <? $this->render_partial('shop:product_attributes') ?>
    <div class="nine columns">
        <div class="page_header">
            <h2 itemprop="name"><?= $product->name ?></h2>
            <h3 itemprop="manufacturer"><?= $product->manufacturer->name ?></h3>
        <!-- Product Short Description -->
        <p class="lead"><strong><?= h($product->short_description) ?></strong></p>
        <!-- Rating -->
        <? if ($product->rating_all): ?>
# Document Type
2 shop:product_partial CMS partial
1 Fenugreek 100 Capsules|Nature's Sunshine New Zealand CMS page