// System.out.println("**********Building_GroupConstraint");
GroupConstraint c = (GroupConstraint)groupConstraint.get(e.next());
Set featureSet = c.getFeatureSet();
if(featureSet.isEmpty())
continue;
GroupConstraintType type = c.getType();
int tempBdd = 1;
if (type == GroupConstraintType.AllGroup){
Iterator i = featureSet.iterator();
tempBdd = 1;