You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occured while evaluating nil.each

Extracted source (around line #12):

9:  <p>
10:  <b>Title:</b><br/>
11:  <select name="individual[title_id]">
12:  <% @titles.each do |title| %>
13:  <option value="<%= title.id %>">
14:  <%= title.title %>
15:  </option>





class Individual < ActiveRecord::Base
  belongs_to :title
  before_save :set_user_data

#  validates_length_of :login, :within => 3..20
#  validates_length_of :password, :within => 8..40
#  validates_presence_of :login, :email, :password, :password_confirmation, :salt
  validates_uniqueness_of :username#, :scope => 'username', :message => "Username already in use."
#  validates_confirmation_of :password
#  validates_format_of :email, :with => /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i, :message => "Invalid email"


  def set_user_data
    salt = Time.now.strftime("%Y-%m-%d %H:%M:%S")
    self.birth_month = self.date_of_birth.month
    self.birth_day = self.date_of_birth.day
    self.created_on = salt
    newpassword = random_string(8)
    self.salutation = newpassword
    newpassword = Digest::SHA1.hexdigest(newpassword+salt)
    self.password = newpassword
  end

  attr_protected :individual_id

  def random_string(len)
    #generate a random password consisting of strings and digits
    chars = ("a".."z").to_a + ("A".."Z").to_a + ("0".."9").to_a
    newpass = ""
    1.upto(len) { |i| newpass << chars[rand(chars.size-1)] }
    return newpass
  end

  def self.authenticate(login, pass)
    u=find(:first, :conditions=>["login = ?", login])
    return nil if u.nil?
    return u if User.encrypt(pass, u.salt)==u.hashed_password
    nil
  end