=== 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	2014-07-26 17:33:42 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/expression/ExpressionService.java	2014-07-27 19:59:20 +0000
@@ -206,7 +206,8 @@
     
     /**
      * Returns all operands included in an expression string. The operand is on
-     * the form <data element id>.<category option combo id>.
+     * the form #{data-element-id.category-option combo-id}. Requires that the
+     * expression has been exploded in order to handle data element totals.
      * 
      * @param expression The expression string.
      * @return A Set of Operands.
@@ -357,7 +358,7 @@
     /**
      * Returns all Operands included in the formulas for the given collection of
      * Indicators. Requires that the explodedNumerator and explodedDenominator
-     * properties have been populated.
+     * properties have been populated in order to handle totals.
      * 
      * @param indicators the collection of Indicators.
      */

=== 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	2014-07-26 17:33:42 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/expression/DefaultExpressionService.java	2014-07-27 19:59:20 +0000
@@ -200,7 +200,11 @@
         final String expressionString = generateExpression( expression.getExplodedExpressionFallback(), valueMap, constantMap, 
             orgUnitCountMap, days, expression.isNullIfBlank() );
 
-        return expressionString != null ? calculateExpression( expressionString ) : null;
+        Double result = expressionString != null ? calculateExpression( expressionString ) : null;
+
+        log.debug( "Expression: " + expression.getExplodedExpressionFallback() + ", generated: " + expressionString + ", result: " + result );
+        
+        return result;
     }
 
     public Double getExpressionValue( Expression expression, Map<DataElementOperand, Double> valueMap,
@@ -209,7 +213,11 @@
         final String expressionString = generateExpression( expression.getExplodedExpressionFallback(), valueMap, constantMap, orgUnitCountMap, days,
             expression.isNullIfBlank(), incompleteValues );
 
-        return expressionString != null ? calculateExpression( expressionString ) : null;
+        Double result = expressionString != null ? calculateExpression( expressionString ) : null;
+        
+        log.debug( "Expression: " + expression.getExplodedExpressionFallback() + ", generated: " + expressionString + ", result: " + result );
+        
+        return result;
     }
 
     @Transactional
@@ -335,7 +343,12 @@
 
             while ( matcher.find() )
             {
-                operandsInExpression.add( DataElementOperand.getOperand( matcher.group() ) );
+                DataElementOperand operand = DataElementOperand.getOperand( matcher.group() );
+                
+                if ( operand.getOptionComboId() != null )
+                {
+                    operandsInExpression.add( operand );
+                }
             }
         }
 

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/validation/ValidatorThread.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/validation/ValidatorThread.java	2014-07-27 16:58:03 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/validation/ValidatorThread.java	2014-07-27 19:59:20 +0000
@@ -136,8 +136,8 @@
 
                                         for ( int optionCombo : attributeOptionCombos )
                                         {
-                                            Double leftSide = leftSideValues.get ( optionCombo );
-                                            Double rightSide = rightSideValues.get ( optionCombo );
+                                            Double leftSide = leftSideValues.get( optionCombo );
+                                            Double rightSide = rightSideValues.get( optionCombo );
                                             boolean violation = false;
 
                                             if ( Operator.compulsory_pair.equals( rule.getOperator() ) )