diff --git a/mindplot/src/main/javascript/XMLMindmapSerializer_Beta.js b/mindplot/src/main/javascript/XMLMindmapSerializer_Beta.js
index ef7605ba..646d82d4 100644
--- a/mindplot/src/main/javascript/XMLMindmapSerializer_Beta.js
+++ b/mindplot/src/main/javascript/XMLMindmapSerializer_Beta.js
@@ -64,7 +64,10 @@ mindplot.XMLMindmapSerializer_Beta.prototype._topicToXML = function(document, to
         } else
         {
             var order = topic.getOrder();
-            parentTopic.setAttribute("order", order);
+             if(core.Utils.isDefined(order) && !isNaN(order-0))
+             {
+                 parentTopic.setAttribute("order", order);
+             }
         }
     }
 
@@ -213,7 +216,7 @@ mindplot.XMLMindmapSerializer_Beta.prototype._deserializeNode = function(domElem
     }
 
     var order = domElem.getAttribute('order');
-    if (core.Utils.isDefined(order)) {
+    if (core.Utils.isDefined(order) && !isNaN(order-0)) {
         topic.setOrder(order);
     }
 
diff --git a/mindplot/src/main/javascript/XMLMindmapSerializer_Pela.js b/mindplot/src/main/javascript/XMLMindmapSerializer_Pela.js
index 58300dae..1e66cc1a 100644
--- a/mindplot/src/main/javascript/XMLMindmapSerializer_Pela.js
+++ b/mindplot/src/main/javascript/XMLMindmapSerializer_Pela.js
@@ -83,7 +83,10 @@ mindplot.XMLMindmapSerializer_Pela.prototype._topicToXML = function(document, to
 //        } else
 //        {
             var order = topic.getOrder();
-            parentTopic.setAttribute("order", order);
+            if(core.Utils.isDefined(order) && !isNaN(order-0))
+            {
+                parentTopic.setAttribute("order", order);
+            }
 //        }
     }
 
@@ -281,7 +284,7 @@ mindplot.XMLMindmapSerializer_Pela.prototype._deserializeNode = function(domElem
     }
 
     var order = domElem.getAttribute('order');
-    if (core.Utils.isDefined(order)) {
+    if (core.Utils.isDefined(order) && !isNaN(order-0)) {
         topic.setOrder(parseInt(order));
     }
 
diff --git a/wise-webapp/src/test/data/wisemaps/strange-char.wxml b/wise-webapp/src/test/data/wisemaps/strange-char.wxml
new file mode 100644
index 00000000..e69de29b
diff --git a/wise-webapp/src/test/java/com/wisemapping/test/freemind/ExportTest.java b/wise-webapp/src/test/java/com/wisemapping/test/freemind/FreemindExportTest.java
similarity index 97%
rename from wise-webapp/src/test/java/com/wisemapping/test/freemind/ExportTest.java
rename to wise-webapp/src/test/java/com/wisemapping/test/freemind/FreemindExportTest.java
index 3b9d2bb5..7ea205c3 100644
--- a/wise-webapp/src/test/java/com/wisemapping/test/freemind/ExportTest.java
+++ b/wise-webapp/src/test/java/com/wisemapping/test/freemind/FreemindExportTest.java
@@ -13,7 +13,7 @@ import org.testng.annotations.Test;
 import java.io.*;
 
 @Test
-public class ExportTest {
+public class FreemindExportTest {
     private static final String DATA_DIR_PATH = "src/test/data/wisemaps/";
 
     @Test(dataProvider = "Data-Provider-Function")
@@ -85,7 +85,7 @@ public class ExportTest {
         final File[] freeMindFiles = dataDir.listFiles(new FilenameFilter() {
 
             public boolean accept(File dir, String name) {
-                return name.endsWith(".xml");
+                return name.endsWith(".wxml");
             }
         });