title: Zabbix:Calculated items from calculated items
body: <p>I have a problem creating calculated items from another ones.</p>
  
  <p>For example i have an item inside a host that is a calculated item from 2 different existenting SNMP items.</p>
  
  <p>When I create in a different host a different calculated item that try to calculate the same operation using 2 calculated items in a different host I obtain a not supported tag with this message:</p>
  
  <blockquote>
    <p>Cannot evaluate function [avg(0)]: item [SMS_Reference:last("Host1:CalculatedItem"] not found</p>
  </blockquote>
  
  <p>My formula:</p>
  
  <pre><code>last("Host_1:Calculated_item_in_Host_1")
  </code></pre>
  
  <p>In fact <code>Host_1:Calculated_item_in_Host_1</code> is another calculated item inside another host and is working perfectly.</p>
  
  <p>Anyone knows how can I fix this problem? </p>