500 Internal Server Error

Technical details:
Error: access to uninitialised variable - item_data
***  in function &quot;(Unknown)&quot;
***  line: return (boolstr(array_length(item_data) &gt; 0))

evaluating argument for _ixif_  around

&lt;%= boolstr(array_length(item_data)&gt;0) %&gt;&gt;
                    &lt;div class=&quot;full_record_data&quot;&gt;
                        &lt;_ixloop_ from=&quot;0&quot; to=&quot;&lt;%= array_bound(item_data) %&gt;&quot;&gt;