Error evaluating expression

Could someone help me, I have an error when I call my report on my page.
Source text: SUM ($ F {QUANTITY})
I show the $V{VQUANTITY} in one TextField
<variable name="VQUANTITY" class="java.lang.Double" incrementType="Report" calculation="Sum">  <variableExpression><![CDATA[SUM($F{QUANTITY})]]></variableExpression>  <initialValueExpression><![CDATA[new Double(0)]]></initialValueExpression> </variable>
The error only occurs when I call the report on the page, as in Jasper Studio it works perfectly.
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Joined: Dec 9 2014 - 9:32am
Last seen: 8 years 3 months ago

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