LibFredo6 is a companion Library required by all my scripts.

LibFredo6 is a shared library used by some of my plugins. It is NOT a standalone plugin. Plugins currently using LibFredo6 are:

  • FredoScale
  • Tools on Surface
  • RoundCorner
  • Curviloft
  • HoverSelect
  • GhostComp
  • SUClock
  • FredoTools
  • Curvizard
  • TopoShaper

You need to install it and respect the versions required by the Plugins, the higher, the better. The current version level of LibFredo6 is 7.7. I maintain backward compatibility so that plugins requiring an older version of LibFredo6 should work with a newer version.

LibFredo6, like my other plugins, is hosted on Sketchucation. Sketchucation is a Community site entirely dedicated to Sketchup. It includes an ExtensionStore of 800+ plugins, as well as a quite rich Discussion Forum about Sketchup and a Gallery. Registering on Sketchucation is FREE.

IF YOU ARE NOT FAMILIAR WITH LIBFREDO6 INSTALLATION OR WITH SKETCHUCATION, it is advised to watch the video "LibFredo6 Installation" at the top of this page.

You can find more information on the Home Page for LibFredo6 on Sketchucation.

IMPORTANT: if you just install LibFredo6 without any of the plugins above, you will see no new toolbar in Sketchup but a menu entry "LibFredo6 Settings.." in the Window menu of Sketchup.



c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:806:in `match'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:806:in `block (2 levels) in load_from_config'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:805:in `each'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:805:in `block in load_from_config'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:803:in `foreach'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:803:in `load_from_config'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:1217:in `block in load_all_plugins'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:1217:in `each'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/lib6core.rbe:1217:in `load_all_plugins'

c:/users/mbi/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:252:in `startup'

C:/Users/mbi/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:63:in `process'

C:/Users/mbi/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:70:in `<module:LibFredo6_Loader>'

C:/Users/mbi/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:28:in `<top (required)>'

Error Loading File Fredo6_TopoShaper.rb

Error: #<TypeError: can't convert nil into an exact number>

C:/Users/mbi/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:79:in `-'

C:/Users/mbi/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:79:in `<top (required)>'

C:/Program Files/SketchUp/SketchUp 2018/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:54:in `require'

C:/Program Files/SketchUp/SketchUp 2018/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:54:in `require'

C:/Users/mbi/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_TopoShaper.rb:47:in `<module:Fredo6>'

C:/Users/mbi/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_TopoShaper.rb:26:in `<top (required)>'


(Apple Mac) I have an impasse with Fred6 Topo. Ihave created from .dwg a 'points' surface from a land survey. Initially, I was able to progress to form the green land surface but it crashed trying to take it further. So I went back to the Points, grouped them and tried again. It will form a surface BUT the area of "Contours" is restricted, no matter which of the three options I try. What am I doing wrong? I have followed the Sketchucation vid as faithfully as I was able.

Appreciate letting us use this plugin thank you! Would definitely recommend to someone who's considering using it and hasn't jumped on board yet. We use SketchUp for our law firm and it helps us streamline what we need to show them out here in Sacramento and it works very well with this plugin.

How to download

Testing this out for some graphic work we can show people on So far it's pretty awesome.

Hi, someone could help me please
ive tried everything but cant fix the problem
I need so much your tools fredo =(

Error Loading File Fredo6_!LibFredo6.rb
Error: ArgumentError: invalid byte sequence in UTF-8
c:/users/usuário/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:43:in `gsub'
c:/users/usuário/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:43:in `get_dir_from_ENV'
c:/users/usuário/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:405:in `dir_appdata'
c:/users/usuário/appdata/roaming/sketchup/sketchup 2018/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:204:in `startup'
C:/Users/Usuário/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:63:in `process'
C:/Users/Usuário/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:70:in `'
C:/Users/Usuário/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:28:in `'

LibFredo in Menu disappear after exit Sketup. How to fix

mgfranz's picture

I am getting the following errors after attempting to install libfredo;

Error Loading File C:/Users/mgfranz/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6/top_LibFredo6.rbe
Failed to read RBE/RBS file.
Error Loading File Fredo6_!LibFredo6.rb
Error: #
C:/Users/mgfranz/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:63:in `process'
C:/Users/mgfranz/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:70:in `'
C:/Users/mgfranz/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:28:in `'

I tried installing using both Preferences and Sketchucation Extension Manager, with this error I cannot install any of the Fredo tools. How do I correct this?

t works fine when interesting a curved surface with a flat plane but two curved surfaces will not give anything. Tried ungrouping exploding everything and selecting just the intersection zone no luck

/Users/richard/Desktop/Screen Shot 2017-12-31 at 10.09.45 PM.png

what am I doing wrong ? Thanks in advance anyone !

Super helpful thank you. Highly recommend this to anyone checking this page out and still undecided. We use SketchUp when educating customers in our residential bird prevention business in Arizona, and it's working great with this plugin.

rafa06n .'s picture

excelente todas! muchas gracias kapo!

I downloaded and installed LibFredo6, then went to SketchUCation and registered but I cant download anything. Tried to download RoundCorner but nothing happened...and its not my computer either because when I pressed the "Donate" button it took me to the correct page (of course), when I pressed the "More Info" button, that also worked. The "Download" button, however yielded NO results. What gives?...You really need to simplify this thing

Gerard K's picture

Sketchucation have had some server problems and have been working on it. (I am not involved) Maybe try again now. If you clear your browser cache and try again it could help as it helped me with a different issue.

Guy E's picture

Hi Fredo. Despite hundreds try with VISUHOLE i can't use DRILL THRU as impossible to drill holes .
Only Stamp, Carve and Emboss are working
i have SU 2017.
Thank you for your help

How to turn on any toolbars or something in SU 2017??

christa L's picture

Why can't I get any of the Fredo Extensions - a window says: You are not allowed to ...
I already have successfully downloaded the Lib fredo ?????

I'm a Mac user, os 10.21. When I use curviloft some of the associated menu's show up unreadably small on my screen.
Do you have a fix for this?
Running Sketchup pro 2016

I have loaded fredo6

karakakouu ..'s picture

Hi everyone

i'm facing the same issue than Dom D on SU17 or SU16 any plugins are working, don't know why, i'm running the software on Windows 10
Please help!! i need it for my work.


Hi Freedo
Having same problem about the toolbar. The plugin is correctly loaded and i can see the toolbar , but when i try to use it nothing happens.
For a couple of days the plugin worked like a charm, and i was able to see the prompt toolbar with all features on. While was working with SU suddenly it crashed, and once i restarted the program , roundcornes started to not work properly.
I 've disabled any other plugin i have, trying to exlude problems may occurr .
Pls any suggest would be appreciated. thx for any answer

Its a great pleasure reading your post.Its full of information I am looking for and I love to post a comment that "The content of your post is awesome" Great work.

Its a great pleasure reading your post.Its full of information I am looking for and I love to post a comment that "The content of your post is awesome" Great work.

Great post
commercial roofing

Office Cleaning Nottingham

Office Cleaning Nottingham

Hey Dom,

I found this page on SketchUcation There is a link to install "RoundCorner_v3.1b.rbz" you need to have "Fredo6_!LibFredo6 - v7.4c - 16 Jan 17.rbz" loaded prior to loading "RoundCorner_v3.1b.rbz". This will add the toolbar to the menu tab.

Follow the below link for round corner:

Follow the below link for instructions:

Hy Th D.
thx for help..
I've already installed the latest version of the library and i used rouncorners for a couple of days before it stopped works properly.. I also can use others plugins like Curviloft or Freedo tools
I can still see roundcorner toolbar but can't see the commands which appear when u select the edge to work on. and when i push on the toolbar nothing happens.. i already tried to unistall and reinstall everithing.. but nada..

Not working at SU2017

Ok everything is working fine!

thanks at all

I can not find the Round Corner Toolbar for 2017 is there a setting that needs to be changed in the program?

Saya msh bingung dan blm bs download libfredo6 versi 5.2 k atas yg diatasnya.mhn bantuan

Suchon B's picture


OPB007's picture

No I haven't and would really like to have it. I was using it for the last few years often but suddenly in SU 2017 it seems there is no update available. I get the same signature outdated message.

OPB007's picture

I can not seem to find an updated version of ROUND CORNERS for SU 2017. Anybody can help?

Many thanks!

The current version works, the signature-message does not affect the plugin, it's just a message.

Hey. Did you ever get to find the updated version? I get signature outdated, plugin not working. Never used it before, looks like a great plugin..

not working in sketchup 2017

thanks for helping


comment installer round corner dans sketchup? merci de votre aide

Amonwan C's picture

thank you so much.

i have sketchup 2016 and it does not work any help plis? i need round corner:(((

Hi, I'm wondering if anyone knows how to increase the size of the pop up menu on Round Corner?All the info is very crowded and as I'm learning it's making it difficult.

I can't seem to catch an end, side or corner to stretch it out.

Many thanks,


Dan F's picture

Thank you for RoundCorners!! I Love it! I wish this was a built-in feature in Sketchup!

Joachim S's picture

Hi, your tools are phenomenal and I just wonder when they will be compatible with SU17?
I have it installed, but the absence of your tools is the sole reason I still use version 16.
Thank you!

Lisbeth's picture

I have a problem...
Error al cargar archivo C:/Users/Lis/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6/top_LibFredo6.rbe
Failed to read RBE/RBS file.
Error al cargar archivo Fredo6_!LibFredo6.rb
Error: #
C:/Users/Lis/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:63:in `process'
C:/Users/Lis/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:70:in `'
C:/Users/Lis/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:28:in `'

This happened when I installed Sketchup 2017. Then I uninstall it (SU 2017) and install Skecthup 2016, and now it does not work for me either. Did not happen I need to use RoundCorner and Su CLOCK!

Ok am I missing something here? I have downloaded and installed LibFredo on my Mac fine. How do I now install round corner?? Please help I have been trying to figure this out all day.

I have tried to put it into the applications plug in folder but did nothing...

Go into Window>Preferences>Extensions>Install Extension and browse for the .rbz file

Marco R.'s picture


i successfully installed Lib Fredo in Sketchup2017.But when i click the icon of Round Corner for example no toolbar is opening.That's really strange.I'm on Windows 7 64 bit.Any ideas ?



Peter h's picture

any progress on this? having same trouble on mac

Curvizard not working on Sketchup 2017. I'm trying to weld segments, but cannot be possible. Help!!!

Richo T's picture

Everytime I try to install roundcorners or curviloft it tells me i need libfredo6 6.9 or higher, even though I have 7.2d installed, anyone has a solution? they were working just fine and suddenly this message started to show up, please help!