Selected property of checkbox gives property not writable exception

Question

hi,
i am facing problem with checkbox!!
in my page there is one table and in each row there is 12 checkbox
and i want to set checkbox selected as per database,and i successfully
completed it with below code <ui:tableRowGroup
binding="#{Setrights1.right_rowgroup}" id="right_rowgroup" rows="10"
                                sourceData="#{Setrights1.right_table_provider}" sourceVar="currentRow">
                                <ui:tableColumn headerText="Module" id="tableColumn1" sort="column1" width="167">
                                    <ui:staticText id="staticText1" text="#{currentRow.value['module_name']}"/>
                                </ui:tableColumn>
                                <ui:tableColumn headerText="Rights" id="tableColumn2" sort="column2">
                                    <h:panelGrid columnClasses="" columns="4" id="rightspanel">
                                        <ui:checkbox
binding="#{Setrights1.create_self}" id="create_self"  label="Create
Self" selected="#{currentRow.value['create_self']==1}"
onClick="common_timeoutSubmitForm(this.form,
'right_table:right_rowgroup:tableColumn2:rightspanel:create_self');"
rendered="#{currentRow.value['create_self']!= ''}"
valueChangeListener="#{Setrights1.create_self_processValueChange}"/>
                               <ui:checkbox
binding="#{Setrights1.create_level}" id="create_level" immediate="true"
label="Create Level"  selected="#{currentRow.value['create_level']==1}"
onClick="common_timeoutSubmitForm(this.form,
'right_table:right_rowgroup:tableColumn2:rightspanel:create_level');"
rendered="#{currentRow.value['create_level']!= ''}"
valueChangeListener="#{Setrights1.create_level_processValueChange}"/>
                                        <ui:checkbox binding="#{Setrights1.add_self}" id="add_self" label="Add Self"
rendered="#{currentRow.value['add_self']!= ''}"
selected="#{currentRow.value['add_self']==1}"/></h:panelGrid>
                                </ui:tableColumn>
                            </ui:tableRowGroup>And in back bean code for dataprovider for populating table.
it works fine table populated with listbox selected value
but
when i select or deselect any checkbox it's processvalue change
executes and checkbox display error icon with property not writable
exception i want to set in array rowkeys and changes values of checkbox
for update operation.
help me i am really stuck at this point

Answer 1

The error means what it says: you are trying to read or write
a value to a non-existing destination.
Debug this to find out which line is erroring, and thus which
reference is null.
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