diff --git a/Tools/Source/SurfaceArea/build.xml b/Tools/Source/SurfaceArea/build.xml
index 703673ba16..7e6368386f 100644
--- a/Tools/Source/SurfaceArea/build.xml
+++ b/Tools/Source/SurfaceArea/build.xml
@@ -100,7 +100,9 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     -->
     <copy file="${SURFACE_AREA_FILE}" tofile="${SURFACE_AREA_FILE}.xml"/>
     <java classname="org.apache.xmlbeans.impl.tool.InstanceValidator" 
-      outputproperty="XMLBEANS_OUTPUT" >
+          outputproperty="XMLBEANS_OUTPUT"
+          resultproperty="XMLBEANS_RESULT"
+          errorproperty="XMLBEANS_ERROR">
           
       <classpath refid="classpath"/>
       <arg value="-dl"/>
@@ -110,7 +112,15 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     </java>   
 
     <delete file="${SURFACE_AREA_FILE}.xml" quiet="true"/>
-    <echo message="Result ... ${XMLBEANS_OUTPUT}"/>
+    <if>
+      <contains string="${XMLBEANS_OUTPUT}" substring="NOT valid"/>
+      <then>
+        <fail message="Result ... ${XMLBEANS_OUTPUT}"/>
+      </then>
+      <else>
+        <echo message="Result ... ${XMLBEANS_OUTPUT}"/>
+      </else>
+    </if>
   </target>
   
   <!--