Hi,
I've seen a couple posts awhile ago about this error. Andrus had offered a solution, but it's not working for me. I re-imported the classes involved into Modeler and re-gened the classes. No fix. Any help?? Here's the problem: when attempting to insert new records into a 1-n relationship, I'm getting this error: org.apache.cayenne.CayenneRuntimeException: [v.2.0.3 May 6 2007] No property for arcId toReportgroup at org.apache.cayenne.access.ObjectDiff.addDiff(ObjectDiff.java:228) at org.apache.cayenne.access.ObjectStore.registerDiff(ObjectStore.java:207) at org.apache.cayenne.access.ObjectStore.recordArcCreated(ObjectStore.java:132) at org.apache.cayenne.CayenneDataObject.setToOneTarget(CayenneDataObject.java:2 97) at org.apache.cayenne.CayenneDataObject.setReverseRelationship(CayenneDataObjec t.java:362) at org.apache.cayenne.CayenneDataObject.addToManyTarget(CayenneDataObject.java: 281) at com.xyz.abc.db.auto._ReportGroup.addToReportdetailArray(_ReportGroup.java:55 ) but I can't see where the error is coming from. Here's the parent class snippet: public class _ReportGroup extends org.apache.cayenne.DataObject { public static final String INSTRUCTIONS_PROPERTY = "instructions"; public static final String ISREQUIRED_PROPERTY = "isrequired"; public static final String NAME_PROPERTY = "name"; public static final String ROLEID_PROPERTY = "roleid"; public static final String REPORTDETAIL_ARRAY_PROPERTY = "reportdetailArray"; public static final String REPORTNOTES_ARRAY_PROPERTY = "reportnotesArray"; public static final String TO_REPORT_PROPERTY = "toReport"; public static final String ID_PK_COLUMN = "ID"; .. public void addToReportdetailArray(com.xyz.abc.db.ReportDetail obj) { addToManyTarget("reportdetailArray", obj, true); } public void removeFromReportdetailArray(com.xyz.abc.db.ReportDetail obj) { removeToManyTarget("reportdetailArray", obj, true); } public List getReportdetailArray() { return (List)readProperty("reportdetailArray"); } And the child class: public class _ReportDetail extends org.apache.cayenne.DataObject { public static final String COLUMNCNT_PROPERTY = "columncnt"; .. public static final String VALUE_PROPERTY = "value"; public static final String TO_REPORT_PROPERTY = "toReport"; public static final String TO_REPORTGROUP_PROPERTY = "toReportgroup"; public static final String ID_PK_COLUMN = "ID"; .. public void setToReportgroup(com.xyz.abc.db.ReportGroup toReportgroup) { setToOneTarget("toReportgroup", toReportgroup, true); } public com.xyz.abc.db.ReportGroup getToReportgroup() { return (com.xyz.abc.db.ReportGroup)readProperty("toReportgroup"); } And the process logic: while (dit.hasNext()) { PlanDetail aPlanDetail = (PlanDetail) dit.next(); PlanItem aPlanItem = aPlanDetail.getToPlanitem(); ReportDetail aDetail = (ReportDetail) dctx.newObject(ReportDetail.class); BeanUtils.copyProperties(aDetail, aPlanItem); aDetail.setDatetime(new Timestamp(new Date().getTime())); aDetail.setValue(null); aDetail.setPlandetailid(DBHelper.getId(aPlanDetail)); //aDetail.setToReportgroup(aReportGroup); aReportGroup.addToReportdetailArray(aDetail); <------- error occurs here } aReport.addToReportgroupArray(aReportGroup);