=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/expression/ExpressionService.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/expression/ExpressionService.java	2011-09-16 07:53:59 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/expression/ExpressionService.java	2011-09-24 12:01:19 +0000
@@ -155,6 +155,14 @@
     String convertExpression( String expression, Map<Object, Integer> dataElementMapping, Map<Object, Integer> categoryOptionComboMapping );
     
     /**
+     * Filters indicators from the given collection where the numerator and /
+     * or the denominator are invalid.
+     *  
+     * @param indicators collection of Indicators.
+     */
+    void filterInvalidIndicators( Collection<Indicator> indicators );
+    
+    /**
      * Tests whether the expression is valid. Returns a positive value if the
      * expression is valid, or a negative value if not.
      * 

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/expression/DefaultExpressionService.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/expression/DefaultExpressionService.java	2011-09-16 07:53:59 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/expression/DefaultExpressionService.java	2011-09-24 12:01:19 +0000
@@ -36,6 +36,7 @@
 
 import java.util.Collection;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;
 import java.util.regex.Matcher;
@@ -283,6 +284,26 @@
 
         return operandsInExpression;
     }
+    
+    public void filterInvalidIndicators( Collection<Indicator> indicators )
+    {
+        if ( indicators != null )
+        {
+            Iterator<Indicator> iterator = indicators.iterator();
+            
+            while ( iterator.hasNext() )
+            {
+                Indicator indicator = iterator.next();
+                
+                if ( !expressionIsValid( indicator.getNumerator() ).equals( VALID ) ||
+                    !expressionIsValid( indicator.getDenominator() ).equals( VALID ) )
+                {
+                    iterator.remove();
+                    log.warn( "Indicator is invalid: " + indicator );
+                }
+            }
+        }
+    }
 
     public String expressionIsValid( String formula )
     {

=== modified file 'dhis-2/dhis-services/dhis-service-datamart-default/src/main/java/org/hisp/dhis/datamart/engine/DefaultDataMartEngine.java'
--- dhis-2/dhis-services/dhis-service-datamart-default/src/main/java/org/hisp/dhis/datamart/engine/DefaultDataMartEngine.java	2011-09-23 22:39:54 +0000
+++ dhis-2/dhis-services/dhis-service-datamart-default/src/main/java/org/hisp/dhis/datamart/engine/DefaultDataMartEngine.java	2011-09-24 12:01:19 +0000
@@ -169,8 +169,10 @@
         Collection<Period> periods = periodService.getPeriods( periodIds );
         Collection<OrganisationUnit> organisationUnits = organisationUnitService.getOrganisationUnits( organisationUnitIds );
         Collection<DataElement> dataElements = dataElementService.getDataElements( dataElementIds );
-        dataElements = FilterUtils.filter( dataElements, new AggregatableDataElementFilter() );
-
+        
+        FilterUtils.filter( dataElements, new AggregatableDataElementFilter() );
+        expressionService.filterInvalidIndicators( indicators );
+        
         // ---------------------------------------------------------------------
         // Explode indicator expressions
         // ---------------------------------------------------------------------