# File control/ServerErrorInfo/ServerErrorInfo.rb, line 8
  def init_context
    @control = page_option(:control)
    params = driver.params
    @error_type = params['type']
    @error_pos = params['id'].to_i
    case (@error_type)
    when 'load'
      @error_sample = @control.setup_load_errors[@error_pos]
    when 'logging'
      @error_sample = @control.setup_logging_errors[@error_pos]
    when 'alias'
      @error_sample = @control.setup_alias_errors[@error_pos]
    when 'document'
      @error_sample = @control.setup_document_errors[@error_pos]
    when 'filter'
      @error_sample = @control.setup_filter_errors[@error_pos]
    else
      raise "unknown error type: #{@error_type.inspect}"
    end
    @frame_info = nil
    @arg_value = nil
  end