Buffer problem

I am trying to spider a site using Hpricot, but I keep getting out of
buffer error. It will only let me do about two sites at a time, is
there a way to clear the buffer after I process each page so I won't
blow the buffer?

Can you post the code you are using?

require 'rubygems'
require 'hpricot'
require 'open-uri'
require 'active_record'

ActiveRecord::Base.establish_connection(
#connection info
)

class Major < ActiveRecord::Base
  has_many :courses
end

class Course < ActiveRecord::Base
  belongs_to :major
end

  def scrape(url)
    doc = Hpricot(open(url))
    tables =(doc/"table")
    (tables[6]/"tr").each do |major|
      createMajor major
    end
  end
  def createMajor(data)
    newMajor = Major.new
    newMajor.title = data.search("td").first.inner_html
    newMajor.abbrev =data.search("acronym").inner_html
    newMajor.link_to = data.search("a").to_s.split('"')[1]
    puts newMajor.save
  end
  def courses(url)
    puts url
    doc = Hpricot(open("http://courses.tamu.edu/"+url.to_s))
    courses = (doc/"//td[@class='sectionheading']")
    courses.each do |course|
      createCourse course
    end
  end
  def createCourse(data)
    course = data.inner_html.strip.split(' ')
    major = course[0]
    course_no = course[1]
    puts major,course_no
    course.pop
    course_name = course.slice!(3,course.length).join(' ')
    puts course_name
  end

AllMajors = Major.find(:all, :limit=>3,:offset=>0)
AllMajors.each do |course|
  courses(course.link_to,course.id)
end
#scrape(url goes here)

This what I was last test with. I had it where scrape would call
courses, but that broke the buffer before I even got output, this
outputs the data from two pages and then breaks.

Anyone someone has to know something about the buffer?