--- a/FrmExportXml.cs	Sat Oct 01 20:45:31 2011 +0100
+++ b/FrmExportXml.cs	Sat Oct 01 20:46:53 2011 +0100
@@ -24,7 +24,7 @@
 			this.army = army;
 			AddButton(Gtk.Stock.Cancel, ResponseType.Cancel);
 			buttonOk = (Button)AddButton(Gtk.Stock.Save, ResponseType.Ok);
-			buttonOk.Clicked+=OnButtonOkClicked;
+			buttonOk.Clicked+= OnButtonOkClicked;
 			transformWidget = new TransformXmlWidget();
 			transformWidget.TransformChanged += HandleTransformWidgetTransformChanged;
 			ExtraWidget = transformWidget;
@@ -37,9 +37,25 @@
 			SetOkayButtonSensitive();
 		}
 
-		private bool IsValid ()
+		private bool IsValid
+		{
+			get
+			{
+				return CheckFileCanExist() && transformWidget.IsValid;
+			}
+		}
+
+		private bool CheckFileCanExist()
 		{
-			return Filename != null && Filename != "" && transformWidget.IsValid;
+			bool canExist = false;
+
+			if (!String.IsNullOrEmpty(Filename))
+			{
+				FileInfo file = new FileInfo(Filename);
+				canExist = file.Directory.Exists;
+			}
+
+			return canExist;
 		}
 
 		private void SetOkayButtonSensitive()
@@ -56,7 +72,7 @@
 
 		protected void OnButtonOkClicked (object sender, System.EventArgs e)
 		{
-			if (IsValid())
+			if (IsValid)
 			{
 				DoExport();
 			}