use iceMock5 test case located at :-
smb://iceads1.icesoft.domain/Public/Users/mircea/iceMock-1.0-SNAPSHOT.war
deploy to tomcat 7
click on "medium" button and then scroll down to "Do Something" button.
ul 30, 2015 4:12:18 PM com.sun.faces.lifecycle.ApplyRequestValuesPhase execute
WARNING: javax.el.PropertyNotFoundException: /WEB-INF/pages/renderers/_renderRelation.xhtml @14,25 value="#{fieldprxy.rowDataModel}": Property 'rowDataModel' not found on type com.ciminc.icemock.FieldProxy
javax.faces.FacesException: javax.el.PropertyNotFoundException: /WEB-INF/pages/renderers/_renderRelation.xhtml @14,25 value="#{fieldprxy.rowDataModel}": Property 'rowDataModel' not found on type com.ciminc.icemock.FieldProxy
at com.icesoft.faces.component.panelseries.UISeries.getValue(UISeries.java:66)
at com.icesoft.faces.component.panelseries.PanelSeries.saveChild(PanelSeries.java:132)
at org.icefaces.impl.component.UISeriesBase.saveChildState(UISeriesBase.java:772)
at org.icefaces.impl.component.UISeriesBase.saveChildState(UISeriesBase.java:775)
at org.icefaces.impl.component.UISeriesBase.saveChildState(UISeriesBase.java:775)
at org.icefaces.impl.component.UISeriesBase.saveChildState(UISeriesBase.java:775)
at org.icefaces.impl.component.UISeriesBase.saveChildState(UISeriesBase.java:775)
at org.icefaces.impl.component.UISeriesBase.saveChildState(UISeriesBase.java:775)
at org.icefaces.impl.component.UISeriesBase.saveChildState(UISeriesBase.java:775)
at org.icefaces.impl.component.UISeriesBase.saveChildState(UISeriesBase.java:775)
at org.icefaces.impl.component.UISeriesBase.saveChildrenState(UISeriesBase.java:766)
at org.icefaces.impl.component.UISeriesBase.setRowIndex(UISeriesBase.java:123)
at org.icefaces.impl.component.UISeriesBase.iterate(UISeriesBase.java:619)
at org.icefaces.impl.component.UISeriesBase.processDecodes(UISeriesBase.java:520)
at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1178)
at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1178)
at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1178)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:925)


FieldProxySubClass should be the underlying object for that iteration of the panelstack.

Notice in the FieldProxyGenerator line 74.
            case 3:
                fld.setGuiObject(FieldDefinition.GUIObject.RELATIONTABLE);
                FieldProxySubClass assocFieldProxy = new FieldProxySubClass(fld, null);
                proxy = assocFieldProxy;
                break;

Also If you notice in the _renderRelation.xhtml there is an expression #{fieldprxy.specializedVariable} which you can see renders properly in the display panel. But when you click the buttton you get an exception.

for markup... see /pages/_renderRelation.xhtml in project.