Hi, (Excuse me if this is a duplicated post.) I tried the following code but got error " is over view "_InitialView" and cannot be added to indexes associated with the different view "created". at org.apache.uima.cas.impl.CASImpl.addFsToIndexes(CASImpl.java:3880) at org.apache.uima.jcas.impl.JCasImpl.addFsToIndexes(JCasImpl.java:1076) ... I checked the source code of UIMA but it seems that the removal of the FS was not made properly. My question is that: 1. Is it impossible to share FeatureStructures between multi-views in a single CAS? 2. If yes, then remove a FS from a view and add it to another view is also impossible? Thanks! -Yoshinobu Inside JCasAnnotatorImplBase with the multi-view settings: public void process(JCas aJCas) throws AnalysisEngineProcessException { TypeSystem typeSystem = aJCas.getTypeSystem(); try { JCas initialView = aJCas.getView("_InitialView"); JCas createdView = initialView.createView("created"); // JCas createdView = aJCas.createView("created"); FSIterator allIndexedFS = initialView.getFSIndexRepository().getAllIndexedFS(typeSystem.getTopType()); while (allIndexedFS.hasNext()) { TOP top = (TOP) allIndexedFS.next(); // I think it should work without removing... top.getView() may have returned illegal handle though it should be removed from indexes initialView.removeFsFromIndexes(top); // top.removeFromIndexes(); createdView.addFsToIndexes(top); } } } catch (CASException e) { e.printStackTrace(); } } -- Yoshinobu KANO kano@is.s.u-tokyo.ac.jp Tsujii Laboratory, the University of Tokyo http://www-tsujii.is.s.u-tokyo.ac.jp/