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mcneel / rhino-developer-samples

Rhino and Grasshopper developer sample code
http://developer.rhino3d.com
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rhino.inside/dotnet/SampleRunGrasshopper is still working? #43

Closed DanielAbalde closed 3 years ago

DanielAbalde commented 3 years ago

Hi @fraguada,

I am not able to make work your sample project:

https://github.com/mcneel/rhino-developer-samples/blob/7/rhino.inside/dotnet/SampleRunGrasshopper/Program.cs

I have the nuget libraries and using .NET 4.8. image

But when I run I got: System.MissingMethodException: 'Method not found: 'Void Grasshopper.Plugin.GH_RhinoScriptInterface.RunHeadless()'.' at https://github.com/mcneel/rhino-developer-samples/blob/579bcefec8d1ae1f0fa437d8f8a7c7529693e120/rhino.inside/dotnet/SampleRunGrasshopper/Program.cs#L39 For some reason looks like is referencing other Grasshopper.dll version, so I tried subscribing to AppDomain.CurrentDomain.AssemblyResolve to load the Grasshopper.dll from the Rhino 7 Plug-ins folder, but after that in the same code line I got System.NullReferenceException: 'Object reference not set to an instance of an object.'.

Could you or someone look into this please?

Thanks.

sbaer commented 3 years ago

I just ran the sample project with no modifications and everything worked.

The two lines of code

var pluginObject = Rhino.RhinoApp.GetPlugInObject("Grasshopper") as Grasshopper.Plugin.GH_RhinoScriptInterface;
pluginObject.RunHeadless();

can be removed since at this point GH is smart enough to know that it is running in a headless environment. Those lines were only necessary in very early service releases of Rhino 7

DanielAbalde commented 3 years ago

Thanks for the help @sbaer.

TL;TR: skip to last paragraph.

I started from scratch and in the debug output I can see:

Begin SendAsync
Before RetryLoop
Before SendHttpRequestAsync
Begin SendHttpRequestAsync
'RunGrasshopper.exe' (CLR v4.0.30319: RunGrasshopper.exe): Loaded 'C:\Users\< my personal path>\Peacock3d\Peacock-Rhinoceros\Build\bin\Grasshopper.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'RunGrasshopper.exe' (CLR v4.0.30319: RunGrasshopper.exe): Loaded 'C:\Users\< my personal path>\Peacock3d\Peacock-Rhinoceros\Build\bin\GH_IO.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
Exception thrown: 'System.MissingMethodException' in RunGrasshopper.exe
An unhandled exception of type 'System.MissingMethodException' occurred in RunGrasshopper.exe
Method not found: 'Void Grasshopper.Plugin.GH_RhinoScriptInterface.RunHeadless()'.

It seems that Grasshopper.dll and GH_IO.dll is being referenced from one of my plugins folder (using Rhino 6) instead from the Rhino installation! How this can happen?

It is even more random, I tried deleting those libraries from \Peacock3d\Peacock-Rhinoceros\Build\bin\, and I run the solution, it works fine. I run it again, and it fails!

Exception thrown: 'System.NullReferenceException' in NGonGh.gha
Rhino.RhinoDoc.ActiveDoc.**get** returned null.

I run it again and it works. I run it again and same error. And so on, very weird... Visual Studio is not consistent for some reason.

👇 I don't know why these GH libraries have been referenced in the wrong folder and with the wrong version of GH (for rh6). Maybe it was a VS error for using the cache, I don't know, or maybe you have some vs project instructions to reference these libraries, in that case maybe it needs a revision, or if it doesn't exist maybe it's convenient to include it.

Thanks!