algorithmic modeling for Rhino


Experiencing a runtime error with all VB scripts in a GH file linked with PC Rhino. See attached screengrab.
I've reinstalled the current runtimes: vcredist_x86.EXE and created new VB.NET components with no change to the error. 
Running 64-bit Windows 7, Rhino 4 SP8, Grasshopper 9.0006

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Did you try to clean up your temporary files? Maybe its some issue with those *.cmdline files. You can use CCleaner from piriform to clean your system. I don`t know if this helps :-)



Hi Heidi,


What happens if you place an empty VB script component on the GH canvas? And what if you then write a simple script such as A = X*Y?

I have recently seen this problem in our office. It occurred when sharing GH files that were created with GH on Rhino 5 with users that are running Rhino 4. You may have to update your .Net framework with Windows update.

Hello Florian and Jonatan:

Thanks for the tips; I'll give them both a shot.


The same error pops up with a new, unlinked VB component on the canvas (with a simple script).

These are tutorial files being generated in Rhino SP9 and then distributed to users (like myself) running Rhino 4 SP8.

vbc.exe is the Visual Basic compiler. It is used to create actual runtime instructions from the textual code you type into a VB script component. 

I don't think I've seen this particular error before. Can you try and re-install the .NET 3.5 full framework?


David Rutten

Poprad, Slovakia

Hello David:

I'm currently running .NET Framework 4... are you suggesting un-installing this and returning to .NET Framework 3.5?


You need .NET 3.5 to run Grasshopper on Rhino4 and .NET 4+ to run on Rhino5. You can have both installed at the same time.


David Rutten

Poprad, Slovakia also seems like this VB component is being directed to vbc.exe in the .NET Framework 2.0.50727 folder eventhough my system has the more recent v4.0 installed. Would this be the issue?

The following versions are in this folder: C:\Windows\Microsoft.NET\Framework 







I re-installed .NET Framework 4.0 and the associated Run Time Updates 4.0.2 + 4.0.3; but no change to the VB component error message. 






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