The type initializer for 'CodecsInfo' threw an exception on Build

[viol3]

I runned ironpython succesfully on editor runtime. I built succesfully MACOSX from iMac and when I run the game, I got the error in title.

HelloWorld works but my code doesn't work. My code works on Editor mode but not in build runtime :)

I have tried to change API Compatibility Level.
I have installed from unitypackage.

The error comes in this line :
source.Execute(scope);

My Code :

using UnityEngine;
using IronPython.Hosting;
using UnityEngine.UI;
using System;
using System.IO;
using System.Text;

namespace Exodrifter.UnityPython.Examples
{
    public class PythonLibrary : MonoBehaviour
    {
        public TextAsset einsteinPy;
        public InputField inputField;
        void Start()
        {
            try
            {
                var engine = Python.CreateEngine();
                var scope = engine.CreateScope();
                // Add the python library path to the engine. Note that this will
                // not work for builds; you will need to manually place the python
                // library files in a place that your code can find it at runtime.
                var paths = engine.GetSearchPaths();
                paths.Add(Application.streamingAssetsPath + "/PythonLibs");
                engine.SetSearchPaths(paths);

                string code = @"from constraint import *
problem = Problem()
nationality = ['Danish', 'Spanish', 'Greek']
criteria = nationality
problem.addVariables(criteria,[1, 2, 3])
problem.addConstraint(AllDifferentConstraint(), nationality)
problem.addConstraint(NotInSetConstraint([1]), ['Greek'])
problem.addConstraint(NotInSetConstraint([2]), ['Danish'])
problem.addConstraint(NotInSetConstraint([3]), ['Spanish'])
problem.addConstraint(NotInSetConstraint([3]), ['Danish'])
solution = problem.getSolutions()[0]
result = ''
print len(problem.getSolutions())
for i in range(1,4):
    for x in solution:
        if solution[x] == i:
            result+=str(x) + ' :: ' + str(i) + ' | '";
                var source = engine.CreateScriptSourceFromString(code);
                source.Execute(scope);
                inputField.text += scope.GetVariable<string>("result");
            }
            catch (Exception ex)
            {
                inputField.text += ex.Message + "\r\n" + ex.StackTrace;
            }


        }
    }
}

StackTrace :

The type initializer for 'CodecsInfo' threw an exception.
  at IronPython.Compiler.Tokenizer.TryGetEncoding (System.Text.Encoding defaultEncoding, System.String line, System.Text.Encoding& enc, System.String& encName) [0x000ea] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.GetSourceReader (System.IO.Stream stream, System.Text.Encoding defaultEncoding, System.String path) [0x000e2] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at Microsoft.Scripting.Runtime.LanguageBoundTextContentProvider.GetReader () [0x0002e] in <d47a77cf2c774bcda41abf48422a59f6>:0 
  at Microsoft.Scripting.SourceUnit.GetReader () [0x00000] in <d47a77cf2c774bcda41abf48422a59f6>:0 
  at IronPython.Compiler.Parser.CreateParserWorker (Microsoft.Scripting.Runtime.CompilerContext context, IronPython.PythonOptions options, System.Boolean verbatim) [0x00037] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Compiler.Parser.CreateParser (Microsoft.Scripting.Runtime.CompilerContext context, IronPython.PythonOptions options) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.ParseAndBindAst (Microsoft.Scripting.Runtime.CompilerContext context) [0x0000d] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.CompilePythonCode (Microsoft.Scripting.SourceUnit sourceUnit, Microsoft.Scripting.CompilerOptions options, Microsoft.Scripting.ErrorSink errorSink) [0x00026] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.GetScriptCode (Microsoft.Scripting.SourceUnit sourceCode, System.String moduleName, IronPython.Runtime.ModuleOptions options, IronPython.Compiler.CompilationMode mode) [0x0002d] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.GetScriptCode (Microsoft.Scripting.SourceUnit sourceCode, System.String moduleName, IronPython.Runtime.ModuleOptions options) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.CompileModule (System.String fileName, System.String moduleName, Microsoft.Scripting.SourceUnit sourceCode, IronPython.Runtime.ModuleOptions options, Microsoft.Scripting.ScriptCode& scriptCode) [0x00021] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.CompileModule (System.String fileName, System.String moduleName, Microsoft.Scripting.SourceUnit sourceCode, IronPython.Runtime.ModuleOptions options) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.LoadFromSourceUnit (IronPython.Runtime.CodeContext context, Microsoft.Scripting.SourceUnit sourceCode, System.String name, System.String path) [0x00006] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.LoadModuleFromSource (IronPython.Runtime.CodeContext context, System.String name, System.String path) [0x00040] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.LoadFromDisk (IronPython.Runtime.CodeContext context, System.String name, System.String fullName, System.String str) [0x00032] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.ImportFromPathHook (IronPython.Runtime.CodeContext context, System.String name, System.String fullName, IronPython.Runtime.List path, System.Func`5[T1,T2,T3,T4,TResult] defaultLoader) [0x0007a] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.ImportFromPath (IronPython.Runtime.CodeContext context, System.String name, System.String fullName, IronPython.Runtime.List path) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.ImportModule (IronPython.Runtime.CodeContext context, System.Object globals, System.String modName, System.Boolean bottom, System.Int32 level) [0x0010c] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Modules.Builtin.__import__ (IronPython.Runtime.CodeContext context, System.String name, System.Object globals, System.Object locals, System.Object fromlist, System.Int32 level) [0x0003c] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at (wrapper delegate-invoke) System.Func`7[IronPython.Runtime.CodeContext,System.String,System.Object,System.Object,System.Object,System.Int32,System.Object].invoke_TResult_T1_T2_T3_T4_T5_T6(IronPython.Runtime.CodeContext,string,object,object,object,int)
  at Microsoft.Scripting.Interpreter.FuncCallInstruction`7[T0,T1,T2,T3,T4,T5,TRet].Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00000] in <344681103b454854bf549f493ce00237>:0 
  at Microsoft.Scripting.Interpreter.Interpreter.Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x0004f] in <344681103b454854bf549f493ce00237>:0 
  at Microsoft.Scripting.Interpreter.LightLambda.Run8[T0,T1,T2,T3,T4,T5,T6,T7,TRet] (T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7) [0x000b1] in <344681103b454854bf549f493ce00237>:0 
  at IronPython.Runtime.Importer.ImportLightThrow (IronPython.Runtime.CodeContext context, System.String fullName, IronPython.Runtime.PythonTuple from, System.Int32 level) [0x00056] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Operations.PythonOps.ImportWithNames (IronPython.Runtime.CodeContext context, System.String fullName, System.String[] names, System.Int32 level) [0x00008] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at Microsoft.Scripting.Interpreter.FuncCallInstruction`5[T0,T1,T2,T3,TRet].Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00000] in <344681103b454854bf549f493ce00237>:0 
  at Microsoft.Scripting.Interpreter.Interpreter.Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x0004f] in <344681103b454854bf549f493ce00237>:0 
  at Microsoft.Scripting.Interpreter.LightLambda.Run1[T0,TRet] (T0 arg0) [0x0003e] in <344681103b454854bf549f493ce00237>:0 
  at IronPython.Compiler.RuntimeScriptCode.InvokeTarget (Microsoft.Scripting.Runtime.Scope scope) [0x0006a] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Compiler.RuntimeScriptCode.Run (Microsoft.Scripting.Runtime.Scope scope) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.InitializeModule (System.String fileName, IronPython.Runtime.ModuleContext moduleContext, Microsoft.Scripting.ScriptCode scriptCode, IronPython.Runtime.ModuleOptions options) [0x00087] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.CompileModule (System.String fileName, System.String moduleName, Microsoft.Scripting.SourceUnit sourceCode, IronPython.Runtime.ModuleOptions options, Microsoft.Scripting.ScriptCode& scriptCode) [0x0004f] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.PythonContext.CompileModule (System.String fileName, System.String moduleName, Microsoft.Scripting.SourceUnit sourceCode, IronPython.Runtime.ModuleOptions options) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.LoadFromSourceUnit (IronPython.Runtime.CodeContext context, Microsoft.Scripting.SourceUnit sourceCode, System.String name, System.String path) [0x00006] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.LoadModuleFromSource (IronPython.Runtime.CodeContext context, System.String name, System.String path) [0x00040] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.LoadPackageFromSource (IronPython.Runtime.CodeContext context, System.String name, System.String path) [0x00095] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.LoadFromDisk (IronPython.Runtime.CodeContext context, System.String name, System.String fullName, System.String str) [0x00018] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.ImportFromPathHook (IronPython.Runtime.CodeContext context, System.String name, System.String fullName, IronPython.Runtime.List path, System.Func`5[T1,T2,T3,T4,TResult] defaultLoader) [0x0007a] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.ImportFromPath (IronPython.Runtime.CodeContext context, System.String name, System.String fullName, IronPython.Runtime.List path) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.ImportTopAbsolute (IronPython.Runtime.CodeContext context, System.String name) [0x00069] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.ImportModule (IronPython.Runtime.CodeContext context, System.Object globals, System.String modName, System.Boolean bottom, System.Int32 level) [0x001da] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Modules.Builtin.__import__ (IronPython.Runtime.CodeContext context, System.String name, System.Object globals, System.Object locals, System.Object fromlist, System.Int32 level) [0x0003c] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at (wrapper delegate-invoke) System.Func`7[IronPython.Runtime.CodeContext,System.String,System.Object,System.Object,System.Object,System.Int32,System.Object].invoke_TResult_T1_T2_T3_T4_T5_T6(IronPython.Runtime.CodeContext,string,object,object,object,int)
  at Microsoft.Scripting.Interpreter.FuncCallInstruction`7[T0,T1,T2,T3,T4,T5,TRet].Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00000] in <344681103b454854bf549f493ce00237>:0 
  at Microsoft.Scripting.Interpreter.Interpreter.Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x0004f] in <344681103b454854bf549f493ce00237>:0 
  at Microsoft.Scripting.Interpreter.LightLambda.Run7[T0,T1,T2,T3,T4,T5,T6,TRet] (T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6) [0x000a0] in <344681103b454854bf549f493ce00237>:0 
  at System.Dynamic.UpdateDelegates.UpdateAndExecute6[T0,T1,T2,T3,T4,T5,TRet] (System.Runtime.CompilerServices.CallSite site, T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5) [0x00144] in <839a3cb835c04d14aeb58d83bb7bc4bd>:0 
  at (wrapper delegate-invoke) System.Func`8[System.Runtime.CompilerServices.CallSite,IronPython.Runtime.CodeContext,System.Object,System.String,IronPython.Runtime.PythonDictionary,IronPython.Runtime.PythonDictionary,IronPython.Runtime.PythonTuple,System.Object].invoke_TResult_T1_T2_T3_T4_T5_T6_T7(System.Runtime.CompilerServices.CallSite,IronPython.Runtime.CodeContext,object,string,IronPython.Runtime.PythonDictionary,IronPython.Runtime.PythonDictionary,IronPython.Runtime.PythonTuple)
  at IronPython.Runtime.Importer.ImportLightThrow (IronPython.Runtime.CodeContext context, System.String fullName, IronPython.Runtime.PythonTuple from, System.Int32 level) [0x0002d] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Importer.Import (IronPython.Runtime.CodeContext context, System.String fullName, IronPython.Runtime.PythonTuple from, System.Int32 level) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Runtime.Operations.PythonOps.ImportStar (IronPython.Runtime.CodeContext context, System.String fullName, System.Int32 level) [0x00015] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at Microsoft.Scripting.Interpreter.ActionCallInstruction`3[T0,T1,T2].Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x00000] in <344681103b454854bf549f493ce00237>:0 
  at Microsoft.Scripting.Interpreter.Interpreter.Run (Microsoft.Scripting.Interpreter.InterpretedFrame frame) [0x0004f] in <344681103b454854bf549f493ce00237>:0 
  at Microsoft.Scripting.Interpreter.LightLambda.Run2[T0,T1,TRet] (T0 arg0, T1 arg1) [0x0004d] in <344681103b454854bf549f493ce00237>:0 
  at IronPython.Compiler.PythonScriptCode.RunWorker (IronPython.Runtime.CodeContext ctx) [0x0001b] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Compiler.PythonScriptCode.Run (Microsoft.Scripting.Runtime.Scope scope) [0x00023] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Compiler.RuntimeScriptCode.InvokeTarget (Microsoft.Scripting.Runtime.Scope scope) [0x000c6] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at IronPython.Compiler.RuntimeScriptCode.Run (Microsoft.Scripting.Runtime.Scope scope) [0x00000] in <6e95101e82ea4feb8f6d4cc1271fa904>:0 
  at Microsoft.Scripting.SourceUnit.Execute (Microsoft.Scripting.Runtime.Scope scope, Microsoft.Scripting.ErrorSink errorSink) [0x0001e] in <d47a77cf2c774bcda41abf48422a59f6>:0 
  at Microsoft.Scripting.SourceUnit.Execute (Microsoft.Scripting.Runtime.Scope scope) [0x00000] in <d47a77cf2c774bcda41abf48422a59f6>:0 
  at Microsoft.Scripting.Hosting.ScriptSource.Execute (Microsoft.Scripting.Hosting.ScriptScope scope) [0x00017] in <d47a77cf2c774bcda41abf48422a59f6>:0 
  at (wrapper remoting-invoke-with-check) Microsoft.Scripting.Hosting.ScriptSource.Execute(Microsoft.Scripting.Hosting.ScriptScope)
  at Exodrifter.UnityPython.Examples.PythonLibrary.Start () [0x0003f] in <ce76bbd974a1440e9790fb7ad4399d31>:0

[exodrifter]

Hey there @viol3, thanks for filing a bug report! I was able to replicate your error; it also appears in Standalone Windows builds. After some digging around, I found this issue. In short, it looks like the python-constraints package uses some localization DLLs that are in the Unity Editor but are not included in your build when Unity builds your project.

To fix your issue, find the location where the DLLs are being stored for the editor:

• Windows: Unity\Editor\Data\Mono\lib\mono\unity
• Mac (Show Package Contents): /Contents/Frameworks/Mono/lib/mono/unity

Then, copy I18N.dll and any of the other I18N.*.dll files as necessary over to your Assets folder. In your specific case, you will need all of them:

• I18N.CJK.dll
• I18N.dll
• I18N.MidEast.dll
• I18N.Other.dll
• I18N.Rare.dll
• I18N.West.dll

Here's a zip download for convenience, but I would suggest getting those DLLs yourself as you have no way to confirm that the DLLs have not been tampered with maliciously.

I won't be patching unity-python since these DLLs are not normally needed unless you install a package that needs them, such as python-constraints. Let me know if you have any other questions!

[viol3]

Problem solved by putting I18N dll files from /Applications/Unity/Unity.app/Contents/Mono/lib/mono to Assets/Plugins folder. Thanks a lot for your quick reply and help!

As you mentioned, problem was encoding difference in python-constraints package.