Some when I do copyAll or RemoveAll, I get this exception.

Could anybody help, how do I fix this.

RE: Error Rendering View[/admin/AdminHome.xhtml]

java.lang.NullPointerException

at org.richfaces.renderkit.ListShuttleRendererBase.encodeOneRow(ListShuttleRendererBase.java:158)

at org.richfaces.renderkit.AbstractRowsRenderer.process(AbstractRowsRenderer.java:83)

at org.richfaces.model.ListShuttleDataModel$2.process(ListShuttleDataModel.java:94)

at org.ajax4jsf.model.SequenceDataModel.walk(SequenceDataModel.java:101)

at org.richfaces.model.ListShuttleDataModel.walk(ListShuttleDataModel.java:88)

at org.ajax4jsf.component.UIDataAdaptorBase.walk(UIDataAdaptorBase.java:1156)

at org.richfaces.renderkit.AbstractRowsRenderer.encodeRows(AbstractRowsRenderer.java:104)

at org.richfaces.renderkit.ListShuttleRendererBase.encodeRows(ListShuttleRendererBase.java:116)

at org.richfaces.renderkit.html.ListShuttleRenderer.doEncodeChildren(ListShuttleRenderer.java:258)

at org.richfaces.renderkit.html.ListShuttleRenderer.doEncodeChildren(ListShuttleRenderer.java:244)

at org.richfaces.renderkit.ListShuttleRendererBase.encodeChildren(ListShuttleRendererBase.java:245)

at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)

at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:271)

at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:242)

at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)

at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:271)

at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:242)

at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)

at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:277)

at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)

at org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRenderer.java:78)

at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)

at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:277)

at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxComponent(AjaxChildrenRenderer.java:166)

at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxChildren(AjaxChildrenRenderer.java:83)

at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxComponent(AjaxChildrenRenderer.java:157)

at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxChildren(AjaxChildrenRenderer.java:83)

at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxComponent(AjaxChildrenRenderer.java:157)

at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxChildren(AjaxChildrenRenderer.java:83)