diff --git a/WebContent/AppFresh/AppFlow/AppFlowCatalogList.jsp b/WebContent/AppFresh/AppFlow/AppFlowCatalogList.jsp
index e97ad16f4..7da5e2e79 100644
--- a/WebContent/AppFresh/AppFlow/AppFlowCatalogList.jsp
+++ b/WebContent/AppFresh/AppFlow/AppFlowCatalogList.jsp
@@ -21,7 +21,7 @@
 
 	function importNewFlow() {
 		AsDialog.selectCatalogDialog("SelectFlow", "", "", function(sReturn) {
-			if (typeof (sReturn) == "undefined" || sReturn.length == 0)
+			if (typeof (sReturn) == "undefined" || sReturn.length == 0||sReturn=="_CANCEL_"||sReturn=="")
 				return;
 			sReturn = sReturn.split("@");
 			var FlowNo = sReturn[0];
diff --git a/WebContent/AppFresh/AppFlow/MiddleList.jsp b/WebContent/AppFresh/AppFlow/MiddleList.jsp
index e9453f0be..b9a1ac8d1 100644
--- a/WebContent/AppFresh/AppFlow/MiddleList.jsp
+++ b/WebContent/AppFresh/AppFlow/MiddleList.jsp
@@ -34,7 +34,7 @@
 		var catalogId = "<%=id%>"
 		var libraryId = "";
 		AsDialog.selectCatalogDialog("AppPageLibraryList", "", "", function(sReturn) { 
-			if (typeof (sReturn) == "undefined" || sReturn.length == 0)
+			if (typeof (sReturn) == "undefined" || sReturn.length == 0||sReturn=="_CANCEL_"||sReturn=="")
 				return;
 				sReturn = sReturn.split("@");
 				libraryId = sReturn[0];
diff --git a/WebContent/AppFresh/AppPage/AppLibraryAdd.jsp b/WebContent/AppFresh/AppPage/AppLibraryAdd.jsp
index a0a28337c..59465fab7 100644
--- a/WebContent/AppFresh/AppPage/AppLibraryAdd.jsp
+++ b/WebContent/AppFresh/AppPage/AppLibraryAdd.jsp
@@ -35,7 +35,7 @@
 		var doname = "";
 		AsDialog.selectCatalogDialog(selName, "", "",
 				function(sReturn) {
-					if (typeof (sReturn) == "undefined" || sReturn.length == 0)
+					if (typeof (sReturn) == "undefined" || sReturn.length == 0||sReturn=="_CANCEL_"||sReturn=="")
 						return;
 					sReturn = sReturn.split("@");
 					dono = sReturn[0];