Thanks for the reply. Im actually trying to instantiate the build-in org.apache.uima.jcas.tcas.Annotation
public static <T extends Annotation> List<T> selectCovered(JCas jCas, final Class<T> type, int begin, int end) { Annotation aT = new Annotation(jCas, begin, end); <- Throws exception List<T> t = null; try { t = JCasUtil.selectCovered(jCas, type, aT); } catch (Exception e) { //ignore logger.warn("Temporal annotation error:["+ begin + "," + end + "]"); } finally { // Remove temporal annotation aT.removeFromIndexes(); } return t; } Caused by: org.apache.uima.cas.CASRuntimeException: JCas type "org.apache.uima.jcas.tcas.Annotation" used in Java code, but was not declared in the XML type descriptor. at org.apache.uima.cas.impl.TypeSystemImpl.throwMissingUIMAtype(TypeSystemImpl.java:2665) at org.apache.uima.cas.impl.TypeSystemImpl.getJCasRegisteredType(TypeSystemImpl.java:2647) at org.apache.uima.cas.impl.FeatureStructureImplC.<init>(FeatureStructureImplC.java:220) at org.apache.uima.jcas.cas.TOP.<init>(TOP.java:87) at org.apache.uima.jcas.cas.AnnotationBase.<init>(AnnotationBase.java:92) at org.apache.uima.jcas.tcas.Annotation.<init>(Annotation.java:162) From the stack trace it seems it is failing TypeSystemImpl here. public TypeImpl getJCasRegisteredType(int i) { // first try without sync lock https://issues.apache.org/jira/browse/UIMA-6249 TypeImpl ti = (i >= jcasRegisteredTypes.size()) ? null : jcasRegisteredTypes.get(i); if (ti != null) { return ti; } synchronized(jcasRegisteredTypes) { ti = (i >= jcasRegisteredTypes.size()) ? null : jcasRegisteredTypes.get(i); } if (null == ti) { throwMissingUIMAtype(i); } return ti; } When I step into the code to check jcasRegisteredTypes org.apache.uima.jcas.tcas.Annotation is not in the List. But, I didn’t think it would be since it is a subtype of AnnotationBase which is in the list.. At the point of failure many annotators have fired. I did upgrade my jcasgen maven plugin to create my custom annotations and they seem to be getting into the type system. Daniel Cosio dcco...@gmail.com > On Apr 12, 2022, at 2:39 AM, Richard Eckart de Castilho <r...@apache.org> > wrote: > > org.apache.uima.jcas.tcas.Annotation