diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/FileGraphSetup.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/FileGraphSetup.java
index 3b8265338..8a390b005 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/FileGraphSetup.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/FileGraphSetup.java
@@ -45,10 +45,13 @@ public class FileGraphSetup implements ServletContextListener {
             return;
         }
 	    
+		boolean aboxChanged = false; // indicates whether any ABox filegraph model has changed
+		boolean tboxChanged = false; // indicates whether any TBox filegraph model has changed
+		
 		try {
 			OntModelSelectorImpl baseOms = (OntModelSelectorImpl) sce.getServletContext().getAttribute("baseOntModelSelector");
 			Store kbStore = (Store) sce.getServletContext().getAttribute("kbStore");
-			
+						
 			// ABox files
 			Set<String> pathSet = sce.getServletContext().getResourcePaths(PATH_ROOT + ABOX);
 			
@@ -56,7 +59,7 @@ public class FileGraphSetup implements ServletContextListener {
 			
 			if (pathSet != null) {
  			   OntModel aboxBaseModel = baseOms.getABoxModel();
-			   readGraphs(sce, pathSet, kbStore, ABOX, aboxBaseModel);		
+			   aboxChanged = readGraphs(sce, pathSet, kbStore, ABOX, aboxBaseModel);		
 			}
 			
 			// TBox files
@@ -66,7 +69,7 @@ public class FileGraphSetup implements ServletContextListener {
 			
 			if (pathSet != null) {
 			   OntModel tboxBaseModel = baseOms.getTBoxModel();
-			   readGraphs(sce, pathSet, kbStore, TBOX, tboxBaseModel);
+			   tboxChanged = readGraphs(sce, pathSet, kbStore, TBOX, tboxBaseModel);
 			}
 		} catch (ClassCastException cce) {
 			String errMsg = "Unable to cast servlet context attribute to the appropriate type " + cce.getLocalizedMessage();
@@ -77,6 +80,10 @@ public class FileGraphSetup implements ServletContextListener {
 			log.error(t);
 			t.printStackTrace();
 		}
+		
+		if (aboxChanged | tboxChanged)  {
+            SimpleReasonerSetup.setRecomputeRequired(sce.getServletContext());
+		}
 	}
 	
 	/*
@@ -88,10 +95,12 @@ public class FileGraphSetup implements ServletContextListener {
 	 * Note: no connection needs to be maintained between the in-memory copy of the
 	 * graph and the DB copy.
 	 */
-	public void readGraphs(ServletContextEvent sce, Set<String> pathSet, Store kbStore, String type, OntModel baseModel) {
+	public boolean readGraphs(ServletContextEvent sce, Set<String> pathSet, Store kbStore, String type, OntModel baseModel) {
 			
 		int count = 0;
 		
+		boolean modelChanged = false;
+		
 		// For each file graph in the target directory update or add that graph to
 		// the Jena SDB, and attach the graph as a submodel of the base model
 		for ( String p : pathSet ) {
@@ -116,7 +125,7 @@ public class FileGraphSetup implements ServletContextListener {
 						 log.info("Attached file graph as " + type + " submodel " + p);
 					} 
 					
-					updateGraphInDB(kbStore, model, type, p);
+					modelChanged = modelChanged | updateGraphInDB(kbStore, model, type, p);
 					
 				} catch (Exception ioe) {
 					log.error("Unable to process file graph " + p, ioe);
@@ -137,7 +146,7 @@ public class FileGraphSetup implements ServletContextListener {
 		
 		System.out.println("Read " + count + " "  + type + " file graph" + ((count == 1) ? "" : "s") + " from " + PATH_ROOT + type);
 		
-		return;
+		return modelChanged;
 	}
 	
 	/*
@@ -150,19 +159,22 @@ public class FileGraphSetup implements ServletContextListener {
 	 * Otherwise, if a graph with the given name is in the DB and is isomorphic with
 	 * the graph that was read from the files system, then do nothing. 
 	 */
-	public void updateGraphInDB(Store kbStore, Model fileModel, String type, String path) {
+	public boolean updateGraphInDB(Store kbStore, Model fileModel, String type, String path) {
 			
 		String graphURI = pathToURI(path,type);
 		Model dbModel = SDBFactory.connectNamedModel(kbStore, graphURI);
+		boolean modelChanged = false;
 		
 		if (dbModel.isEmpty() ) {
 			dbModel.add(fileModel);
+			modelChanged = true;
 		} else if (!dbModel.isIsomorphicWith(fileModel)) {
 		    dbModel.removeAll();
 		    dbModel.add(fileModel);
+		    modelChanged = true;
 		}
 		
-		return;
+		return modelChanged;
 	}
 	
 	/*