Index: src-core/src/org/openbravo/base/VariablesBase.java
===================================================================
--- src-core/src/org/openbravo/base/VariablesBase.java	(revision 14928)
+++ src-core/src/org/openbravo/base/VariablesBase.java	(working copy)
@@ -888,7 +888,7 @@
     String auxStr = null;
     try {
       auxStr = (String) session.getAttribute(sessionAttribute.toUpperCase());
-      if (auxStr==null)
+      if (auxStr==null || auxStr.equals(""))
         auxStr = defaultValue;
     }
     catch (Exception e) {