Problem with in-memory filtering: JBO-25016: View object is read only

Question

Hello,
I have problem with implementation of Steve's Muench example #71 - Dropdown Lists in Table with Different Choices per Row.
Source for the list is a read only view object.
Invoking viewObject.findByViewCriteria throwing:
javax.faces.el.EvaluationException: oracle.jbo.ReadOnlyViewObjectException: JBO-25016: View object ... is read only.
What's wrong?
Rado
Error stack:
Caused by: oracle.jbo.ReadOnlyViewObjectException: JBO-25016: View object ... is read only.
     at oracle.jbo.server.ViewDefImpl.newInstance(ViewDefImpl.java:991)
     at oracle.jbo.server.ViewObjectImpl.createInstance(ViewObjectImpl.java:2784)
     at oracle.jbo.server.QueryCollection.createRowWithEntities(QueryCollection.java:1271)
     at oracle.jbo.server.ViewRowSetImpl.createRowWithEntities(ViewRowSetImpl.java:1869)
     at oracle.jbo.server.ViewRowSetImpl.makeRowCopy(ViewRowSetImpl.java:1546)
     at oracle.jbo.server.ViewRowSetImpl.insertRowAtInternal(ViewRowSetImpl.java:1667)
     at oracle.jbo.server.ViewRowSetImpl.findByViewCriteria(ViewRowSetImpl.java:4126)
     at oracle.jbo.server.ViewObjectImpl.findByViewCriteria(ViewObjectImpl.java:7033)
My code:
public RowIterator selectDetails(String code) {
ViewObject vo = getVO();
if (!vo.isExecuted()) {
vo.setQueryMode(ViewObject.QUERY_MODE_SCAN_DATABASE_TABLES);
vo.executeQuery();
vo.last();
vo.setQueryMode(ViewObject.QUERY_MODE_SCAN_VIEW_ROWS);
ViewCriteria vc = vo.createViewCriteria();
ViewCriteriaRow vcr = vc.createViewCriteriaRow();
vcr.setAttribute("Code", "='"+code+"'");
vc.add(vcr);
vc.setCriteriaMode(ViewCriteria.CRITERIA_MODE_CACHE);
return vo.findByViewCriteria(vc,-1,ViewObject.QUERY_MODE_SCAN_VIEW_ROWS);
}

Answer 1

check attribute settings of your VO...
the attribute for wich you set view criteria must be set to queryable and updatable - always