Thank you for your help.
It works perfectly.
Thank you again.

Thank you for your answer.
As you execute the code you sent, Error: #SystemStackError: stack level too deep]
There's a message.

I will upload the sketchup file.

I want to extract the name of the Component Instance Definition in each group.

Bug_2.skp

Hello, I'm a beginner in Ruby's development.
We are currently developing a Ruby to extract component information within the group.
The component information inside the group is extracted, but the component information within the group and within the group cannot be extracted.
Is there a way to continue searching for a child group by applying a repeat statement to get some component information?

code :

sel.each do |ss|
  if not ss.class == Sketchup;;Group
    UI.messagebox ('그룹을 선택해 주세요')
    return
  end
  #@group_names.push(ss.name)
  #@num_entities.push(ss.entities.length)

  #각 인스턴스 별 Definition 이름을 @name 배열에 넣는다.
  ss.entities.each do |e|
    if e.class == Sketchup;;ComponentInstance
      if e.definition.name.include? '-' or e.definition.name.include? '_'
        if e.definition.name.include? '~'
          ename = e.definition.name.gsub!('~','')
        else
          ename = e.definition.name
        end
        if ename.include? '#'
          @names.push(ename.split('#')[0].strip)
        else
          @names.push(ename)
        end
      end
    elsif e.class == Sketchup;;Group
      e.entities.each do |ee|
        if ee.definition.name.include? '-' or ee.definition.name.include? '_'
          if ee.definition.name.include? '~'
            ename = ee.definition.name.gsub!('~','')
          else
            ename = ee.definition.name
          end
          if ename.include? '#'
            @names.push(ename.split('#')[0].strip)
          else
            @names.push(ename)
          end
        end
      end
    end
  end #ss.each에 대한 END
  #@name의 배열 순서를 정렬한다.
  @names = @names.sort!

  #@name의 배열을 같은 내용을 묶어 해시로 통합한다.
  hash_overlap = @names.each_with_object(Hash.new(0)) { |word,counts| counts[word] += 1 }


  @comp_names = (hash_overlap.to_a)


    #comp_names의 내용을 h, b, t1, t2, length별로 분류한다.
    @comp_names.each do |str|
      num = str[0].split('-')[1].strip
      i = 0
      while i < num.count('X') + 1
          str.push(num.split('X')[i].strip)
          i = i + 1
      end
      #str.push(num.split('X')[1].strip)
      #str.push(num.split('X')[2].strip)
      #str.push(num.split('X')[3].strip)
      #str.push(num.split('X')[4].strip)
      end

  @hash_names.store(ss.name, @comp_names)
  @names = []
  hash_overlap = {}
end #sel.each에 대한 end