algorithmic modeling for Rhino

Jon Mirtschin's Comments

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At 3:23am on May 21, 2019, mahsa said…

hi, i want to transfer my rhino file in to sap2000 v20,and i'm new to sap.i found out that i should use the geometry gym i downloaded [ggRhino6SAP20 v1.4.04.msi (31st March 2019) v20].it didn't ask me for any license during the installation.but now when i want to use the command,it says as an unknown command.what should i do?


At 9:20am on May 14, 2019, sonia ruta said…

Dear Jon,

after repairing ggRhino6Karamba1.3.1 , it shows "1. Solution exception:Unlicensed!!! To activate full functionality please request a trial license by running command ggKarambaZZLicenseRequest
Run Rhino command ggKarambaZZLicenseRequest or contact Jon!"

Could you please help me to solve it? it is a little bit urgent  I'm doing my Thesis project with it...many thanks!


At 10:53am on February 6, 2019, Tina Irvine said…

Hi Jon, 

I'm trying to use the ggstage in Grasshopper to get the relevant stages into GSA.

However, it doesn't seem to like the active elements I'm inputting. I keep getting the error message '1. Solution exception:Object reference not set to an instance of an object.' Is there a trick to getting this to work? I also can't fed the ggStageProp into GSA either?

Can you help? 


At 12:58pm on August 9, 2018, foodove said…

sry~and my email is, ty~

At 11:54am on August 9, 2018, foodove said…

Dear Jon,

after repairing ggRhino5Karamba1.3.0 v0.1.10, it shows "1. Solution exception: Unlicensed!!! To activate full functionality please request a trial license by running command ggKarambaZZLicenseRequest
Run Rhino command ggKarambaZZLicenseRequest or contact Jon!", I ran Rhino command ggKarambaZZLicenseRequest but it doesn't work. Could you please help me to solve it? it is a little bit urgent bc I'm doing my Thesis project with it...many thanks!



At 10:01am on February 16, 2018, Scabinus said…
Dear Jon,
I find your ggmeshtobrep command in rhino very usefull, why you did not develop it for
At 8:52am on June 23, 2017, Omid Karami said…

Hi jon

I downloaded your Geometry gym Plug-in, unfortunately it does not work because its license expire. How should I do? And I have one more question: How does gtt Plug-in work?

My email address is:

Yours Sincerely


At 12:27pm on October 20, 2016, Sebastien de Wit said…

Dear Jon,

I have some serious troubles getting the surface properly meshed with equal lengths, prior to the form finding part. Perhaps Kangaroo itself is able to do this? Hope you can help because meshing odd surfaces instead of rectangular shapes is not often shown on the forum.

Yours sincerely,


At 3:42am on July 18, 2014, shahryar said…

Dear Jon,

I am trying to import one gbXML file which was exported by Revit .I have  loaded it in Ecotect to apply material. Now, I am planning to import in Rhino to analysis in grasshopper. I have downloaded geometrygym plugin but it does not work in Rhino and just appears in grasshopper. Would you please guide and help me by offering any information how I can to import gbXML files to Rhino.

Yours sincerely,

At 10:41am on August 27, 2013, Gabriel Áh said…

hey Jon, 

 Im trying to use geo gym, but this legend pops out:

where can i get the free evaluation code and then extend it to the educational version

by the way thanks for sharing, and congrats for the hard work



At 12:43pm on June 7, 2013, Mehdi Hasanzadeh Samadi said…

is there any plug-in for revit 2013 32-bit too ? i just see the 64-bit version !!

At 3:36am on January 16, 2013, trung1133 said…


i am not able to learn anything from the example files as some things turn red!!! then back to orange if i remove the NAME (N) i.e. nameless component

please help

At 11:25am on January 13, 2013, John Stanford said…

Hi Jon, thanks for adding, i'm pretty interested about your work and i've been looking around your site some time ago.

i've been using grasshopper only for quiet sometime now, so im still trying to figure out the basic stuff, but i think it would provide such a great help in doing my architectural studies combined with BIM software at hand

has there been any new update about grasshopper and archicad connection?


At 8:43pm on December 20, 2012, Chansoo Byeon said…

Hello Jon

Thanks for the add! 

Could you give me some tips of where I should start? I really want to master Grasshopper.

At 5:35am on October 28, 2012, Guido Nieri said…

Hi Jon,

I am a student and I am interested in your plug-in. I would like to use that on my thesis, are there any student version?

Thank you

At 3:31am on August 14, 2012, djordje said…


I knew we can count on you, you Australian genius !!!

At 5:07pm on August 13, 2012, djordje said…

Jon I took a look at your article about Rhino/Grasshopper to Vasari import.

Is there any other way to eliminate the Revit in the process of importing?

At 6:12pm on July 6, 2012, Diego Xavier said…

Hi Jon!

Thank you for the Geom Gym activation. I´ll be participating in a workshop that maybe will use your software!



At 11:21am on June 20, 2012, Herwig Scherabon said…

Hi Jon, thanks for the friendship and sending the license so quick!

Just one question: am I able to transfer the xml to my other computer, or do I have to send a new license request?

I stupidly sent my request from my macbook and actually need to use GG on my tower ;)

At 4:06am on June 16, 2012, stefano vafiadis said…

Hello Jon, I received yesterday night your reply: thanks for the license and for the friendship too, I'll send you my student credentials when the end of the trial period will be near.

Cheers, Stefano//





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