DLL not found

[YoruCathy]

DllNotFoundException: taichi_unity assembly:<unknown assembly> type:<unknown type> member:(null)
Taichi.Generated.Ffi.TixImportNativeRuntimeUnity () (at Assets/Taichi/Generated/taichi_unity.cs:26)
Taichi.Runtime.get_Singleton () (at Assets/Taichi/Runtime.cs:20)
Taichi.AotModule..ctor (System.String module_path) (at Assets/Taichi/AotModule.cs:10)
Taichi.AotModuleAsset.Load () (at Assets/Taichi/AotModuleAsset.cs:24)
Taichi.AotModuleAsset.GetAllKernels () (at Assets/Taichi/AotModuleAsset.cs:47)
ImplicitFem.Start () (at Assets/Scripts/ImplicitFem.cs:81)

Hi team, I'm trying to run this example on Ubuntu 20.04, with Unity 2023.1.0a21. It is complaining about the error above. Any suggestions for resolving this?

[PENGUINLIONG]

Sorry that we don't have prebuilt binary for Linux platform, but the examples should work out of the box on either Windows/macOS. You can follow the instruction here (https://github.com/taichi-dev/taichi-unity2) and see if you can build libtaichi_c_api.so and libtaichi_unity2.so and put them to Assets/Plugins.

[sarahhaha]

I am getting the same issue on both Windows/macOS... Is there anything I can look into for this issue on Windows/macOS?

[PENGUINLIONG]

That's funny. Could you provide more information like unity logs etc about that? The repo is continuously covered by our CI so it shouldn't break.

[sarahhaha]

It is the same DLLNotFoundException as above.
DllNotFoundException: taichi_unity assembly: type: member:(null)
Taichi.Generated.Ffi.TixImportNativeRuntimeUnity () (at Assets/Taichi/Generated/taichi_unity.cs:26)
Taichi.Runtime.get_Singleton () (at Assets/Taichi/Runtime.cs:20)
Taichi.AotModule..ctor (System.String module_path) (at Assets/Taichi/AotModule.cs:10)
Taichi.AotModuleAsset.Load () (at Assets/Taichi/AotModuleAsset.cs:24)
Taichi.AotModuleAsset.GetAllKernels () (at Assets/Taichi/AotModuleAsset.cs:47)
Mpm88.Start () (at Assets/Scripts/Mpm88.cs:33)

There is also a NullReferenceException which I believe is caused by the DLL not being found.
NullReferenceException: Object reference not set to an instance of an object
Mpm88.Update () (at Assets/Scripts/Mpm88.cs:102)

[PENGUINLIONG]

Well I just upgraded the prebuilts in #27. Please check if the latest master still have the problem. At least I tried a bit and it simply works. Otherwise I would recommend you to double check if you have installed the MSVC redistributables https://learn.microsoft.com/en-US/cpp/windows/latest-supported-vc-redist?view=msvc-170 but it should come with any Windows 10 or higher. If it again crashes I can hardly help.

[YoruCathy]

Hi @PENGUINLIONG , in the readme there's a unity version requirement saying it needs 2022.3.14 or above to operate, but we can not find this version anywhere. Is this a typo?

[sarahhaha]

@PENGUINLIONG Thank you for upgrading the prebuilt. I have ended up fixing this issue by getting a fresh build and following the developer installation here https://docs.taichi-lang.org/docs/dev_install.