Hi TIG
Thanks for your help. It just shows how little I understand abaut the task. May I ask for your permission to post this code somewhere else on the internet?
Besides if it isn't too hard I could pay for solving this problem. Please contact me if you interested.
Thanks again for your help.

Hello TIG
I have changed the piece of code you gave me but now it doesnt get nested childrens DC attributes. Only selected Parents cabinet attributes are reported. My dynamic cabinet has nested dynamic parts which contains DC attributes RepL, RepW and so on. Please help, just one tiny step left.
Here is the code I have now.

	model = Sketchup.active_model
	#defs=model.definitions
	ins = model.selection.grep(Sketchup;;ComponentInstance)
	defs=[]
	ins.each{|i|
	next unless i.definition.attribute_dictionary("dynamic_attributes")
	defs << i.definition
	}
	defs.uniq
		
    dcs=[]
    defs.each{|dc|
      next if not dc.attribute_dictionary("dynamic_attributes")
      dcs << dc
    }
    if not dcs
      UI.messagebox("No DCs were available.\nExiting.")
     return nil
    end#if
    insts=[]
    dcs.each{|dc|insts << dc.instances}
    insts.flatten!
    insts.uniq!
    insts.compact!
    data=[]
    insts.each{|inst|
      defn=inst.definition
      #name=defn.name.tr(sep,"_")
      repname=defn.get_attribute("dynamic_attributes","repname",0).to_s
     repmat=defn.get_attribute("dynamic_attributes","repmat",0).to_s
     rept=defn.get_attribute("dynamic_attributes","rept",0).to_s
     repl=defn.get_attribute("dynamic_attributes","repl",0).to_s
     repw=defn.get_attribute("dynamic_attributes","repw",0).to_s
     reppvc=defn.get_attribute("dynamic_attributes","reppvc",0).to_s
      dat=repname+sep+repmat+sep+rept+sep+repl+sep+repw+sep+reppvc
                
      data << dat
    }

Hello TIG
I have edited your code and it exports all DCs of the model. How to make it export only selected DCs?
I think I have to write ss = model.selection line somewhere. But where should I put it?
Thank you for your help.

=begin
(c) TIG 2011
Script:
TIG-exportDCs2csv.rb
Type;
  TIG.exportDCs2csv
in the Ruby Console to run it.
Exports all DCs is the model with a Name,LenX,LenY,LenZ,Layer[s]... 
'CSV' file - in the model's folder and named after the model thus;
ModelName.skp >>> ModelNameDCs.csv
If a new model is unsaved the current directory receives the new file.
All Layers used in the DC are listed by name and visible ones marked 
thus >>LayerName<<
Edit sep="," if something other than separating comma is desired e.g. ';'
Make sep="\t" if a TSV file is desired and change ext="csv" to ext="tsv".
It uses the current Model Units.
Version;
1.0 20111104 First issue.
1.1 20111221 DCs customized.
=end
require 'sketchup.rb'
###
module TIG
  unless file_loaded?(__FILE__)
	UI.menu("Plugins").add_item("TIG.exportDCs2csv2"){TIG.exportDCs2csv2()}
  end
  file_loaded(__FILE__)
  def self.exportDCs2csv2() #Exports everything without selection
  
  
  
    sep="," ### <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    ext="csv" ### <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    model = Sketchup.active_model
    defs=model.definitions
    dcs=[]
    defs.each{|dc|
      next if not dc.attribute_dictionary("dynamic_attributes")
      dcs << dc
    }
    if not dcs
      UI.messagebox("No DCs were available.\nExiting.")
	  return nil
    end#if
    insts = ss.grep(Sketchup;;ComponentInstance) #insts=[]
    dcs.each{|dc|insts << dc.instances}
    insts.flatten!
    insts.uniq!
    insts.compact!
    data=[]
    insts.each{|inst|
      defn=inst.definition
      #name=defn.name.tr(sep,"_")
      repname=defn.get_attribute("dynamic_attributes","repname",0).to_s
	  repmat=defn.get_attribute("dynamic_attributes","repmat",0).to_s
	  rept=defn.get_attribute("dynamic_attributes","rept",0).to_s
	  repl=defn.get_attribute("dynamic_attributes","repl",0).to_s
	  repw=defn.get_attribute("dynamic_attributes","repw",0).to_s
	  reppvc=defn.get_attribute("dynamic_attributes","reppvc",0).to_s
      dat=repname+sep+repmat+sep+rept+sep+repl+sep+repw+sep+reppvc
            
      
      data << dat
    }
    path=model.path
    if not path or path==""
      path=Dir.pwd
      title="Untitled"
    else
      path=File.dirname(path)
      title=model.title
    end#if
    ofile=File.join(path,title+'DCs.'+ext).tr("\\","/")
    begin
      file=File.new(ofile,"w")
    rescue### trap if open
      UI.messagebox("File;\n\n  "+ofile+"\n\nCannot be written - it's probably already open.\nClose it and try making it again...\n\nExiting...")
	  return nil
    end
    data.each{|d|file.puts(d)}
    file.close
    puts (data.length.to_s)+" DCs written to\n"+ofile
    puts 'DONE.'
    begin
      UI.openURL("file;/"+ofile)
    rescue
    end
  end#def
  
end#module
###

Sorry I don't explain it right. Be selecting a drawer I get report of drawers "parent" attributes. Please see the attached picture.
What I am trying to get is DC childrens report, like on the second screenshot.
Please help me out.

Please help me out TIG. I am banging my head to a wall for months now. How to make your code cycle through nested DCs ant get their LenX, LenY, LenZ, other attributes to csv?
Plaease help, I am stuck.

Dynamic drawer 220210.skp

TIG thank you for quick answer. I have named component instances (ie right, left, bottom part etc.) inside dynamic drawer component but still get report of drawers outer dimensions only. I am trying to get report of inner parts of the drawer. Like your ComponentReporter++ cycles through all components and gives report of all components within other component. I would like to get same report of all mined nested DC parts of a DC drawer. Thanks again.

Hi TIG, Thank you very much for the plugin. Is there a way to get all DCs reported within another DC?
I've attached dynamic drawer model as an example. I'd like to get report of nested parts of a drawer.
Thanks again.

Dynamic drawer 210925.skp