Unhandled Error!

Trying to get property of non-object

Document Product
Document type CMS page
Line 7
Exception class Cms_ExecutionException

Code Highlight

<div class="leftside smaller qualities">
    <div class="pane white" style="width:140px">
       <div class="title"><h3>Qualities</h3></div>
 
       <div class="center">
           <h4>Length</h4>
         <div class="pie pie<?=$product->x_hart_length;?>"></div>
           <h4>Complexity</h4>
           <div class="pie pie<?=$product->x_hart_complexity;?>"></div>
           <h4>Intensity</h4>
           <div class="pie pie<?=$product->x_hart_intensity;?>"></div>
       </div>
    </div>
# Document Type
1 Product CMS page