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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Unable to load shared library 'libdl.so'","articleBody":"### Environment\r\n\r\n-   Pythonnet version:3.0.0.0\r\n-   Python version:3.8.5\r\n-   Operating System: Ubuntu 18.04 (Windows 10, WSL 2.0)\r\n-   .NET Runtime: Dotnet Core 5.0.201\r\n\r\n### Details\r\n\r\nI am trying to execute a Python file in a dotnet core program. I get the newest source code from github, and compiled it successfully as a DLL accoding the guidence. The version of the DLL is 3.0.0.0. I add this DLL as a reference of the project, and compile the project successfully. And then I use the command 'dotnet run' to execute the code. An exception occours with message: **Unhandled exception. System.TypeInitializationException: The type initializer for 'Python.Runtime.UcsMarshaler' threw an exception.**\r\n\r\n### Code\r\n\r\n#### program.cs\r\n\r\nThe exception occurs when trying to execute the line: PythonEngine.PythonHome = \"/home/leo/Anaconda3\";\r\n\r\n``` c#\r\nusing Python.Runtime;\r\nusing System;\r\nusing System.IO;\r\n\r\nnamespace PythonDotNet\r\n{\r\n    class Program\r\n    {\r\n        static void Main(string[] args)\r\n        {\r\n            \r\n            try\r\n            {\r\n                PythonEngine.PythonHome = \"/home/leo/Anaconda3\";\r\n                PythonEngine.Initialize();\r\n\r\n                var script = File.ReadAllText(\"t1.py\");\r\n\r\n                PyDict locals = new PyDict();\r\n\r\n                PythonEngine.Exec(script, null, locals.Handle);\r\n                \r\n            }\r\n            finally\r\n            {\r\n                PythonEngine.Shutdown();\r\n                Console.WriteLine(\"Done...\");\r\n                Console.ReadKey();\r\n\r\n            }\r\n\r\n        }\r\n    }\r\n}\r\n\r\n```\r\n#### python_dotnet.csproj\r\n``` xml\r\n\u003cProject Sdk=\"Microsoft.NET.Sdk\"\u003e\r\n\r\n  \u003cPropertyGroup\u003e\r\n    \u003cOutputType\u003eExe\u003c/OutputType\u003e\r\n    \u003cTargetFramework\u003enet5.0\u003c/TargetFramework\u003e\r\n  \u003c/PropertyGroup\u003e\r\n\r\n\u003cItemGroup\u003e\r\n    \u003cReference Include=\"Python.Runtime\"\u003e\r\n        \u003cHintPath\u003eref/Python.Runtime.dll\u003c/HintPath\u003e\r\n    \u003c/Reference\u003e\r\n\u003c/ItemGroup\u003e\r\n\r\n    \u003cItemGroup\u003e\r\n    \u003cNone Update=\"t1.py\"\u003e\r\n      \u003cCopyToOutputDirectory\u003ePreserveNewest\u003c/CopyToOutputDirectory\u003e\r\n    \u003c/None\u003e\r\n  \u003c/ItemGroup\u003e\r\n\u003c/Project\u003e\r\n\r\n```\r\n\r\n### command to run\r\n\r\n``` shell\r\ndotnet run\r\n```\r\n\r\n### Exception\r\n\r\nThe error message indicates that there is a file named 'lidbl.so'. \r\n\r\n```\r\nUnhandled exception. System.TypeInitializationException: The type initializer for 'Python.Runtime.UcsMarshaler' threw an exception.\r\n ---\u003e System.TypeInitializationException: The type initializer for 'Delegates' threw an exception.\r\n ---\u003e System.TypeInitializationException: The type initializer for 'Python.Runtime.Runtime' threw an exception.\r\n ---\u003e System.DllNotFoundException: Unable to load shared library 'libdl.so' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: liblibdl.so: cannot open shared object file: No such file or directory\r\n   at Python.Runtime.Platform.LinuxLoader.dlerror()\r\n   at Python.Runtime.Platform.LinuxLoader.ClearError() in /home/leo/project/pythonnet/src/runtime/platform/LibraryLoader.cs:line 90\r\n   at Python.Runtime.Platform.LinuxLoader.GetFunction(IntPtr dllHandle, String name) in /home/leo/project/pythonnet/src/runtime/platform/LibraryLoader.cs:line 78\r\n   at Python.Runtime.Runtime.GetDefaultDllName() in /home/leo/project/pythonnet/src/runtime/runtime.cs:line 42\r\n   at Python.Runtime.Runtime..cctor() in /home/leo/project/pythonnet/src/runtime/runtime.cs:line 34\r\n   --- End of inner exception stack trace ---\r\n   at Python.Runtime.Runtime.Delegates..cctor() in /home/leo/project/pythonnet/src/runtime/runtime.cs:line 2251\r\n   --- End of inner exception stack trace ---\r\n   at Python.Runtime.Runtime.Delegates.get_PyUnicode_GetMax() in /home/leo/project/pythonnet/src/runtime/runtime.cs:line 2688\r\n   at Python.Runtime.Runtime.PyUnicode_GetMax() in /home/leo/project/pythonnet/src/runtime/runtime.cs:line 1559\r\n   at Python.Runtime.UcsMarshaler..cctor() in /home/leo/project/pythonnet/src/runtime/CustomMarshaler.cs:line 44\r\n   --- End of inner exception stack trace ---\r\n   at Python.Runtime.UcsMarshaler.Py3UnicodePy2StringtoPtr(String s) in /home/leo/project/pythonnet/src/runtime/CustomMarshaler.cs:line 124\r\n   at Python.Runtime.PythonEngine.set_PythonHome(String value) in /home/leo/project/pythonnet/src/runtime/pythonengine.cs:line 97\r\n   at PythonDotNet.Program.Main(String[] args) in /home/leo/project/python_dotnet/Program.cs:line 14\r\n```","author":{"url":"https://github.com/eightrivers","@type":"Person","name":"eightrivers"},"datePublished":"2021-03-19T13:16:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/1422/pythonnet/issues/1422"}