GHA assembly wizard ERROR

I encountered a problem while create a new GH component with GH add-on by using Visual Studio 2010. I installed Wizard assembly from website, it shows under tools>extension Manager. I got an error,( please see attached the screen shot.) so the new project with add-on cannot open at all.

"system.Argument null exception:Value cannot be null

Parameter name:path1

at system.IO.Path.Combine(String path1, String path 2)

at GH wizard.UserInputForm..ctor(Dictionary2 repmacements)"

at GHWizard.CollectInformationWizard.RunStarted(object auotmationObject)

Dictionary 2 replacementsDictionary,WizardRunKind run Kind, Objevt[]

customParams)"

Any idea what went wrong ?

Thank you for your time,

Attachments:

Error.jpg, 2 MB

Replies to This Discussion

Permalink Reply by Giulio Piacentino on November 20, 2012 at 6:04am

http://visualstudiogallery.msdn.microsoft.com/9e389515-0719-47b4-a4...

The current wizard is still "For Grasshopper 0.8.xx". It may need to be updated by somebody at McNeel.

What I can guess that is not working is the way to find Grasshopper, as it expects to find it under "Rhinoceros 4.0\Plugins\". Can you check that?

Permalink Reply by Elcin Ertugrul on November 20, 2012 at 6:15am

I guess yes, I have rhino 5 evaluation & Rhino 4 and latest grasshopper 0.9.0014.

I will ask my classmates, none of them had this problem during the lecture.

Is there any way to fix the problem ?

Permalink Reply by Elcin Ertugrul on November 20, 2012 at 6:31am

If I am right,it seem they are under Grasshopper file;

GH_IO.dll, GH_IO.xml, GH_IO.Viever.exe, GH _Util ?

should I install 08.xx version of Grasshopper ? both R4 and R5 i have latest version of grasshopper installed.

Permalink Reply by Giulio Piacentino on November 20, 2012 at 6:47am

I no longer work for McNeel, so please take this as freely given advice without any warranty. One possibility is that you installed Grasshopper for Rhino 5, which, under a certain point of view, is "another program". Also, try to select the Grasshopper assembly folder manually.

On a lighter note, I am curious about the class where you are studying. Where is that?

Permalink Reply by Elcin Ertugrul on November 20, 2012 at 7:04am

Thank you so much for your help. I will try later today after hours, but I don't think I understood what i should try. Could u please be more specific for me. I am kind of lost in translation when it comes very technical.

The class is Object Oriented Programming at Product Architecture Lab graduate program under ME at Stevens Institute of Technology. We are very diverse group of students; architects, civil engineers mechanical engineers.

Thank you so much again,

Permalink Reply by Elcin Ertugrul on November 20, 2012 at 6:47pm

Still no luck on wizard. apprarenlty I have the same configuration but my VS didn't start the GHA.

Permalink Reply by Giulio Piacentino on November 21, 2012 at 1:27am

The following is my last attempt. After this, you need to contact support at tech@mcneel.com as they probably need to check with you one-on-one. Can you post a screenshot of the wizard window before it prompts the error?

Permalink Reply by Elcin Ertugrul on November 21, 2012 at 6:08am

Thank you so much.

Attachments:

wizardstartingpage.jpg, 2.1 MB
ExtensionManager.jpg, 1.9 MB

Permalink Reply by Giulio Piacentino on November 21, 2012 at 7:59am

Sorry, I do not know in this situation. Please wait for somebody from McNeel to contact you, or contact them at the address above. They will probably have to look at this with you. Thanks

Giulio

Permalink Reply by Serge Neuman on July 5, 2013 at 4:13am

I have the same issue, same error message.

Any solution to fix it?

Thanks

Permalink Reply by Serge Neuman on July 9, 2013 at 9:32am

I found a solution. If someone could double check it and update the wizard it would be great.

First part of the solution:

Correct UserInputForm.cs

line 49 The variable should be grasshopperPath and not rhinocommonPath

(this is not the bug but if the correction is not made, then the form doesn't clearly ask for the dll

Second part of the solution (and here it corrects the bug)

Do something so we do not execute line 53 -if (File.Exists(Path.Combine(path, "rhinocommon.dll")))- if path == null.

The way I did it is certainly not the most elegant one but it's efficient. I have added the two following line of code

if (path == null)

path = "C:\\";

--------------

Now I have also corrected the code so it finds the dll on my computer. But I'm not sure the installation is the same for everyone. On my computer the information GrashopperFinder.cs is looking for is not under the LocalMachine hive but under the CurrentUser hive! So FindGrasshopper (line 19) is never checking for the right hive.

As I'm on a Windows 7 - 64, I have just added at line 28 the following code

SearchRegistryKey(rh5_64_Reg, rh5_RegName, RegistryHive.CurrentUser, RegistryView.Registry64, strings);

Now everything seems to work with the latest version of Grasshopper. So next step is to put the right .NET version and also extend the wizard to Visual Studio Express 2012 or beyond (Already done for the wizard for Rhino, so it shouldn't be an bid problem).

Anyways, thank you if someone who know how to code can double check what I did and correct everything (i.e. put the right code on GitHub + the corrected template on the VisualStudioGallery

Regards

Serge

Permalink Reply by Giulio Piacentino on July 9, 2013 at 9:55am

Hi Serge,

nice that you went through to help fix this. Somebody can fix that at McNeel. There's likely more to do, and possibly something to remove, because that code was written at the time of Rhino 4 and when Grasshopper was installed on a machine level. Now there are .rhi installers, so locations are different.

Giulio