code: private int getTaskCode(String field) throws MPXJException
     {
        Integer result = m_taskNumbers.get(field.trim());
  
        if (result == null)
        {
           throw new MPXJException(MPXJException.INVALID_TASK_FIELD_NAME + " " + field);
        }
  
        return (result.intValue());
     }
docs: Returns code number of Task field supplied.
  
  @param field - name
  @return - code no