Problem with last column in footer - 11G

Question

Hello,
I have a problem with displaying sum in footer for af:table .
The footer connected to attributeValues which defined in the pageDef.
I have 3 columns in the footer, the two first are shown fine, but last one is empty , althouh they are defined the same way.
Replacing the order of columns did not resolve the problem, because still the last column is not shown.
Any help will be appriciated.
pageDef:
<attributeValues id="BalancesDetailsViewSumCountUsed"
IterBinding="InitBvBalancesDetailsViewIterator">
<AttrNames>
<Item Value="SumCountUsed"/>
</AttrNames>
</attributeValues>
<attributeValues id="BalancesDetailsViewSumDifference" IterBinding="InitBvBalancesDetailsViewIterator">
<AttrNames>
<Item Value="SumDifference"/>
</AttrNames>
</attributeValues>
Jspx:
column c2 is fine , but c3 is empty
<af:column sortProperty="CountUsed" sortable="false" id="*c2*"
headerText="#{res['balances.countUsed']}" width="80px">
<af:outputText value="#{row.CountUsed}">
<f:convertNumber groupingUsed="false"
pattern="#{bindings.BalancesAMBalancesDetailsView.formats.CountUsed}"/>
</af:outputText>
<f:facet name="footer">
<af:outputText value="#{bindings.BalancesDetailsViewSumCountUsed.inputValue}">
<f:convertNumber groupingUsed="false"
pattern="#{bindings.BalancesDetailsViewSumCountUsed.format}"/>
</af:outputText>
</f:facet>
</af:column>
<af:column sortProperty="Difference" sortable="false" id="*c3*"
headerText="#{res['balances.difference']}" width="80px">
<af:outputText value="#{row.Difference}">
<f:convertNumber groupingUsed="false"
pattern="#{bindings.BalancesAMBalancesDetailsView.formats.Difference}"/>
</af:outputText>
*<f:facet name="footer">*
*<af:outputText value="#{bindings. BalancesDetailsViewSumDifference.inputValue}">*
*<f:convertNumber groupingUsed="false"*
*pattern="#{bindings. BalancesDetailsViewSumDifference.format}"/> </af:outputText>*
*</f:facet>*
</af:column>
Thanks!

Answer 1

Thanks you all!
I found the problem. The iterator which sum the coulmn was at the last after the second sum, so it return null.
So I replaced the hasNext() function with getAllRowsInRange() and now it is OK.