python and ghpython failure after installation of MSVC2010 build files

I would like to put this out to anyone who has enough experience in .NET Framework or C# debugging.

So this is the exception that is throws right now:

1. Solution exception:Method not found: 'System.Reflection.MemberInfo[] Microsoft.Scripting.Generation.CompilerHelpers.FilterNonVisibleMembers(System.Type, System.Reflection.MemberInfo[])'.

As you will see below, this has been affecting quite a few people over the last few years, and it seems i may have stumbled upon a clue today.

This happened to me after i tried to build an MSVC2010 .sln file (Visual Studio Solution) in Visual Studio 2015 in a separate task that required me to download some files for MSVC2010.

A few hours after that happened, i was calling a c# component in grasshopper, and right after that all my python components failed.

I'm hoping this is reproducible to people more knowledgeable in C# and that someone might be able to shed some light on this troubling matter? I shall pray to the C# gods tonight and offer meat buns. :)

thank you for your time,

p.s. similar problems all over the net. if it is solved here, i will post the link to the solution in all the links below:

Similar grasshopper community questions:

http://www.grasshopper3d.com/group/ladybug/forum/topics/ladybug-run...

http://www.grasshopper3d.com/profiles/blogs/runtime-error-on-py-com...

http://www.grasshopper3d.com/group/ladybug/forum/topics/ladybug-run...

Similar ironpython community questions

http://ironpython-users.python.narkive.com/S7i7l85w/missingmethodex...

http://stackoverflow.com/questions/8058832/system-missingmethodexce...

Attachments:

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Replies to This Discussion

Permalink Reply by Giulio Piacentino on March 8, 2017 at 12:26pm

Hi Tan Li,

this is a shot in the dark, but you could try updating the .Net framework or repairing it.

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Permalink Reply by tang li qun on March 9, 2017 at 3:45am

Dear Giulio,

Thank you for your reply. I couldn't pinpoint the problem still, and so in the end I did a clean reinstall that included deleting stuff from AppData>Local and AppData>Roaming (since there was an ironpython folder in there).

Regarding .Net, I uninstalled Visual Studio and all the .Net (4.0, 4.5, 4.6) packages i could see in 'Remove Programs', prior to the clean reinstall, and found that there were some .Net retargeting packages that added to the confusion.

after clearing everything and reinstalling rhino, it worked. Strange thing is that now I couldn't find any .Net installation on the programs list (they still exist, when i checked it with the .net verifier). I hope this is the end to this strange mess.

Thanks for the suggestion!

Regards

Li Qun

Permalink Reply by Giulio Piacentino on March 9, 2017 at 4:00am

I'm glad it worked in the end :D

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