throws FileNotFoundException, IOException {
ExtendedProperties p = readPropertiesFromFile(fileName);
// update the properties in the vector of properties
// for every property set the value read in the file and set the command line value to null.
Enumeration e = p.keys();
while (e.hasMoreElements()) {
boolean found = false;
String name = (String) e.nextElement();
Enumeration it = propertiesVector.elements();