LibFredo6 is a companion Library required by all my scripts.

VERY IMPORTANT: If you use AdditionalPluginFolders, you must upgrade to AdditionaPluginFolders v5.0 or higher.

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

You need to install it and respect the versions required by the Plugins, the higher, the better. The current version level of LibFredo6 is 7.4 (so 74 in integer form). I maintain backward compatibility so that plugins requiring an older version of LibFredo6 should work with a new version.

For more information and PDF documentation, see (on Sketchucation - registration is free).

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


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

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

Inside configuration Default Parameters: LibFredo6

hit: Retina Screen

close your SU e restart... and enjoy

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

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!

fredo6's picture

1) Can you check if LibFredo6 is properly loaded (menu Window > LibFredo6 Settings....

2) Do you get the message for both Curviloft and RoundCorner or just Curviloft

3) Despite the message do you get Curviloft an RoundCorner usable (toolbar, menu) ?

Also, it is good to know which version of SU you have and on which platform.



Richo T's picture

Thanks for your answer!

1) LibFredo6 is not properly loaded by sketchup since a message tells me so everytime i start Sketchup and there's no LibFredo6 settings option in my window menu

2) I started getting the message for both Curviloft an RoundCorner just after I upgraded LibFredo6 6.9

3) At first i could see Curviloft and RoundCorner toolbars but when i pressed a comand, nothing happened, now they don't appear at all

I'm working on Sketchup 2016 for windows 64-bit, it should be noted that until yesterday everything was working fine, it was until i knew there was a newer version of LibFredo6 and I upgraded my plugin that this problem showed up. Any thoughts about it?

fredo6's picture

I suggest you have a close look at your plugin folder, because there must be some files or folders missing or redundant.
May be a cleanup and fresh reinstall would solve it.


Hello Fredo, I left a message on Sketchucation with the same error message as Richo T - after my initial post you produced 7.2d - I am also running 2016 and after many deleted plug-ins & re-installs keep getting the "need >v6.9" error message.
Regards, Rob (topbobster)

I am suddenly getting this error on startup of Sketchup 2016 as well. I upgraded to v. 7.2e from 7.2d but it did not help and uninstalled, reinstalled, cleaned up many times. Strange how it suddenly started without any changes to anything. This is the error text:

Error Loading File C:/Users/Greg/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/Greg/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:63:in `process'
C:/Users/Greg/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:70:in `'
C:/Users/Greg/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:28:in `'

Richo T's picture

Same for me, I gave up after hours and hours of trying to solve it, I've been exporting all my work to 3ds Max so I can apply bevel or chamfer if needed, luckily I know how to use both programs well, but it's a shame for those who doesn't, hope this can be solved soon, I'll be checking everyday.

Frankie Chiu's picture

Hi Fredo

Thanks for your Animation, Love it,

Having problem when I set the capture view, and press "Capture" / save and exit"
the capture view isn't what was set at.

Pls advise what is the problem

Million thanks.


fredo6's picture

I guess you refer to my Animator extension.

It is in Beta (public) and all information and discussion is done in a dedicated public forum of Sketchucation, at

If you are not user, just create your login (it's FREE).


Jo W.'s picture

Is there any older installation file? I'm getting an error message ' Libfredo6 folder not found ' . BTW I'm using sketchup 2013.

fredo6's picture


There is a major issue with SU6, SU7, SU8 and SU2013. I fixed it and republished as LibFred6 v7.2d - 01 Nov 16, but it takes a little bit of time in the Extension Warehouse to be published.

In the meantime, you can get it from the Sketchucation PluginStore



hola, no puedo instalar ninguna de las extensiones, me dice que necesito la version 6.9. es como que no reconoce la actualizacion de los archivos. hay alguna solucion? gracias


could it be it install in 2016?

A alguien se le instala con el sketchup 2016???

Deon V's picture

I would love to try Roundcorner and Curviloft. But to register on Sketchucation I need to pay a minimum of $15 per month. I am sure that price is a pittance in the real world. But here in Africa we need to multiply that amount with 15. Can this extensions be downloaded from Extension warehouse?

Actually, in much smaller letters, right above wherre they teoll you to pay there is a link to a free registration. Just downloaded my copy of RoundCorner.

148629 users
4.89 MB
LibFredo6 (7.4c); January 17, 2017
Number of Views: 
OS Compatibility: 
Extensions: 2
More by fredo6