diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdater.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdater.java
index f057f99e6..f11aadf30 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdater.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdater.java
@@ -53,7 +53,7 @@ public class OntologyUpdater {
 		}
 	}
 	
-	private void performUpdate() {
+	private void performUpdate() throws IOException {
 		List<AtomicOntologyChange> changes = getAtomicOntologyChanges();
 		
 		//updateTBox(changes);
@@ -66,8 +66,9 @@ public class OntologyUpdater {
 		// perform additional additions and retractions
 	}
 	
-	private List<AtomicOntologyChange> getAtomicOntologyChanges() {
-		return null; //Anup's code is called here
+	private List<AtomicOntologyChange> getAtomicOntologyChanges() 
+			throws IOException {
+		return OntologyChangeParser.parseFile(settings.getDiffFile());
 	}
 	
 	private void updateABox(List<AtomicOntologyChange> changes) {
@@ -135,4 +136,10 @@ public class OntologyUpdater {
 		}
 	}
 	
+	private void log(String log) {
+		
+	}
+	
+	
+	
 }
diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/UpdateKnowledgeBase.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/UpdateKnowledgeBase.java
index e2ecbbe63..5c8654516 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/UpdateKnowledgeBase.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/UpdateKnowledgeBase.java
@@ -60,8 +60,13 @@ public class UpdateKnowledgeBase implements ServletContextListener {
 		try {
 			(new OntologyUpdater(settings)).update(); 
 		} catch (IOException ioe) {
-			throw new RuntimeException("IOException updating knowledge base " +
-					"for ontology changes", ioe);
+			String errMsg = "IOException updating knowledge base " +
+				"for ontology changes: ";
+			// Tomcat doesn't always seem to print exceptions thrown from
+			// context listeners
+			System.out.println(errMsg);
+			ioe.printStackTrace();
+			throw new RuntimeException(errMsg, ioe);
 		}
 		
 	}