diff --git a/rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/view/monitor/MonitorViewPage.java b/rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/view/monitor/MonitorViewPage.java
index 7085bb44865..31c03ed0392 100644
--- a/rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/view/monitor/MonitorViewPage.java
+++ b/rse/plugins/org.eclipse.rse.ui/UI/org/eclipse/rse/ui/view/monitor/MonitorViewPage.java
@@ -143,7 +143,10 @@ FocusListener
 		   					if (children != null)
 		   					{
 		   						SystemTableTreeViewProvider provider = (SystemTableTreeViewProvider)_viewer.getContentProvider();
-								provider.setCache(children);
+		   						if (provider!=null) {
+		   							//bug 150924: provider can be lost when disconnecting while this job runs
+									provider.setCache(children);
+		   						}
 								
 		   					}