diff --git a/org.eclipse.stem/core/org.eclipse.stem.ui.ge/src/org/eclipse/stem/ui/ge/views/GEViewContentProvider.java b/org.eclipse.stem/core/org.eclipse.stem.ui.ge/src/org/eclipse/stem/ui/ge/views/GEViewContentProvider.java
index f85a562..e580336 100644
--- a/org.eclipse.stem/core/org.eclipse.stem.ui.ge/src/org/eclipse/stem/ui/ge/views/GEViewContentProvider.java
+++ b/org.eclipse.stem/core/org.eclipse.stem.ui.ge/src/org/eclipse/stem/ui/ge/views/GEViewContentProvider.java
@@ -148,8 +148,8 @@
 		GELog.debug(this.getClass(),"simulationsChange: ");
 
 
-		viewer.remove(event.getSimulationsRemoved());
-		viewer.add(event.getSimulationsAdded());
+		viewer.remove((Object[])event.getSimulationsRemoved());
+		viewer.add((Object[])event.getSimulationsAdded());
 		if (this.currentSimulation == null && 
 				event.getSimulationsAdded().length > 0)  {
 			currentSimulation = event.getSimulationsAdded()[0];
diff --git a/org.eclipse.stem/core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/views/ActiveBatchesView.java b/org.eclipse.stem/core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/views/ActiveBatchesView.java
index f61922d..43b372c 100644
--- a/org.eclipse.stem/core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/views/ActiveBatchesView.java
+++ b/org.eclipse.stem/core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/views/ActiveBatchesView.java
@@ -123,8 +123,8 @@
 		public void batchesChanged(final BatchManagerEvent event) {
 			viewer.getList().setRedraw(false);
 			try {
-				viewer.remove(event.getBatchesRemoved());
-				viewer.add(event.getBatchesAdded());
+				viewer.remove((Object[])event.getBatchesRemoved());
+				viewer.add((Object[])event.getBatchesAdded());
 			} finally {
 				viewer.getList().setRedraw(true);
 			}
diff --git a/org.eclipse.stem/core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/views/ActiveSimulationsView.java b/org.eclipse.stem/core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/views/ActiveSimulationsView.java
index cbd3c48..8aaed02 100644
--- a/org.eclipse.stem/core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/views/ActiveSimulationsView.java
+++ b/org.eclipse.stem/core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/views/ActiveSimulationsView.java
@@ -124,8 +124,8 @@
 		public void simulationsChanged(final SimulationManagerEvent event) {
 			viewer.getList().setRedraw(false);
 			try {
-				viewer.remove(event.getSimulationsRemoved());
-				viewer.add(event.getSimulationsAdded());
+				viewer.remove((Object[])event.getSimulationsRemoved());
+				viewer.add((Object[])event.getSimulationsAdded());
 			} finally {
 				viewer.getList().setRedraw(true);
 			}