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TinyMapper error #530

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opened 2025-12-29 08:29:31 +01:00 by adam · 8 comments
adam commented 2025-12-29 08:29:31 +01:00
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Originally created by @rmeshksar on GitHub (Jul 19, 2023).

Originally assigned to: @StefH on GitHub.

I created a console application and enabled Admin Interface.
Now when I try to use admin API, I am getting this error:

System.TypeInitializationException: The type initializer for 'WireMock.Util.TinyMapperUtils' threw an exception. ---> System.IO.FileLoadException: Could not load file or assembly 'TinyMapper, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. A strongly-named assembly is required.

It seams the similar issue that is mentioned here:
https://github.com/WireMock-Net/WireMock.Net/wiki/Could-not-load-file-or-assembly-RestEase

I added Brutal.Dev.StrongNameSigner to the console application.
First I had hard time compiling the project and I had to close and open Visual Studio, and finally when the project got compiled, still I got the same error.

I am using Wiremock .Net 1.5.32

This is the full log:

Mock server started on port:8443
2023-07-19 8:00:42 PM [Info] : By Stef Heyenrath (https://github.com/WireMock-Net/WireMock.Net)
2023-07-19 8:00:42 PM [Debug] : Server settings {
  "Port": 8443,
  "UseSSL": null,
  "HostingScheme": null,
  "StartAdminInterface": true,
  "ReadStaticMappings": true,
  "WatchStaticMappings": null,
  "WatchStaticMappingsInSubdirectories": true,
  "ProxyAndRecordSettings": null,
  "Urls": null,
  "StartTimeout": 10000,
  "AllowPartialMapping": null,
  "AdminUsername": null,
  "AdminPassword": null,
  "AdminAzureADTenant": null,
  "AdminAzureADAudience": null,
  "RequestLogExpirationDuration": null,
  "MaxRequestLogCount": null,
  "CorsPolicyOptions": null,
  "AllowCSharpCodeMatcher": null,
  "AllowBodyForAllHttpMethods": null,
  "AllowOnlyDefinedHttpStatusCodeInResponse": null,
  "DisableJsonBodyParsing": null,
  "DisableRequestBodyDecompressing": null,
  "DisableDeserializeFormUrlEncoded": null,
  "HandleRequestsSynchronously": null,
  "ThrowExceptionWhenMatcherFails": null,
  "CertificateSettings": null,
  "CustomCertificateDefined": false,
  "ClientCertificateMode": 0,
  "AcceptAnyClientCertificate": false,
  "WebhookSettings": null,
  "UseRegexExtended": true,
  "SaveUnmatchedRequests": null,
  "DoNotSaveDynamicResponseInLogEntry": null,
  "QueryParameterMultipleValueSupport": null
}
2023-07-19 8:00:42 PM [Info] : Server using .NET Framework 4.6.1 or higher
2023-07-19 8:00:42 PM [Info] : The Static Mapping folder 'C:\MockServer\bin\Debug\__admin\mappings' does not exist, reading Static MappingFiles will be skipped.
Press any key to stop the server
2023-07-19 8:00:50 PM [Error] : Providing a Response for Mapping 'dafb6c48-6a92-401b-8007-b7fb287588b2' failed. HttpStatusCode set to 500. Exception: System.TypeInitializationException: The type initializer for 'WireMock.Util.TinyMapperUtils' threw an exception. ---> System.IO.FileLoadException: Could not load file or assembly 'TinyMapper, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. A strongly-named assembly is required. (Exception from HRESULT: 0x80131044)
   at WireMock.Util.TinyMapperUtils..ctor()
   at WireMock.Util.TinyMapperUtils..cctor()
   --- End of inner exception stack trace ---
   at WireMock.Util.TinyMapperUtils.get_Instance()
   at WireMock.Server.WireMockServer.SettingsGet(IRequestMessage requestMessage)
   at WireMock.ResponseProviders.DynamicResponseProvider.ProvideResponseAsync(IMapping mapping, IRequestMessage requestMessage, WireMockServerSettings settings)
   at WireMock.Mapping.ProvideResponseAsync(IRequestMessage requestMessage)
   at WireMock.Owin.WireMockMiddleware.<InvokeInternalAsync>d__9.MoveNext()
2023-07-19 8:00:50 PM [DebugRequestResponse] : Admin[True] {
  "Guid": "88b09893-2829-4821-a01d-f6775dadc672",
  "Request": {
    "ClientIP": "::1",
    "DateTime": "2023-07-19T20:00:50.824846Z",
    "Path": "/__admin/settings",
    "AbsolutePath": "/__admin/settings",
    "Url": "http://localhost:8443/__admin/settings",
    "AbsoluteUrl": "http://localhost:8443/__admin/settings",
    "ProxyUrl": null,
    "Query": {},
    "Method": "GET",
    "Headers": {
      "Connection": [
        "keep-alive"
      ],
      "Accept": [
        "*/*"
      ],
      "Accept-Encoding": [
        "gzip, deflate, br"
      ],
      "Host": [
        "localhost:8443"
      ],
      "User-Agent": [
        "PostmanRuntime/7.32.3"
      ],
      "Postman-Token": [
        "d61474f4-03be-4b8d-bce3-2fd64ccf7f97"
      ]
    },
    "Cookies": {},
    "Body": null,
    "BodyAsJson": null,
    "BodyAsBytes": null,
    "BodyEncoding": null,
    "DetectedBodyType": null,
    "DetectedBodyTypeFromContentType": null
  },
  "Response": {
    "StatusCode": 500,
    "Headers": {
      "Content-Type": [
        "application/json"
      ]
    },
    "BodyDestination": null,
    "Body": null,
    "BodyAsJson": {
      "Guid": null,
      "Status": "The type initializer for 'WireMock.Util.TinyMapperUtils' threw an exception."
    },
    "BodyAsBytes": null,
    "BodyAsFile": null,
    "BodyAsFileIsCached": null,
    "BodyOriginal": null,
    "BodyEncoding": null,
    "DetectedBodyType": 2,
    "DetectedBodyTypeFromContentType": null,
    "FaultType": null,
    "FaultPercentage": null
  },
  "MappingGuid": "dafb6c48-6a92-401b-8007-b7fb287588b2",
  "MappingTitle": null,
  "RequestMatchResult": {
    "TotalScore": 2.0,
    "TotalNumber": 2,
    "IsPerfectMatch": true,
    "AverageTotalScore": 1.0,
    "MatchDetails": [
      {
        "Name": "PathMatcher",
        "Score": 1.0
      },
      {
        "Name": "MethodMatcher",
        "Score": 1.0
      }
    ]
  },
  "PartialMappingGuid": "dafb6c48-6a92-401b-8007-b7fb287588b2",
  "PartialMappingTitle": null,
  "PartialRequestMatchResult": {
    "TotalScore": 2.0,
    "TotalNumber": 2,
    "IsPerfectMatch": true,
    "AverageTotalScore": 1.0,
    "MatchDetails": [
      {
        "Name": "PathMatcher",
        "Score": 1.0
      },
      {
        "Name": "MethodMatcher",
        "Score": 1.0
      }
    ]
  }
}
Originally created by @rmeshksar on GitHub (Jul 19, 2023). Originally assigned to: @StefH on GitHub. I created a console application and enabled Admin Interface. Now when I try to use admin API, I am getting this error: System.TypeInitializationException: The type initializer for 'WireMock.Util.TinyMapperUtils' threw an exception. ---> System.IO.FileLoadException: Could not load file or assembly 'TinyMapper, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. A strongly-named assembly is required. It seams the similar issue that is mentioned here: https://github.com/WireMock-Net/WireMock.Net/wiki/Could-not-load-file-or-assembly-RestEase I added Brutal.Dev.StrongNameSigner to the console application. First I had hard time compiling the project and I had to close and open Visual Studio, and finally when the project got compiled, still I got the same error. I am using Wiremock .Net 1.5.32 This is the full log: ``` Mock server started on port:8443 2023-07-19 8:00:42 PM [Info] : By Stef Heyenrath (https://github.com/WireMock-Net/WireMock.Net) 2023-07-19 8:00:42 PM [Debug] : Server settings { "Port": 8443, "UseSSL": null, "HostingScheme": null, "StartAdminInterface": true, "ReadStaticMappings": true, "WatchStaticMappings": null, "WatchStaticMappingsInSubdirectories": true, "ProxyAndRecordSettings": null, "Urls": null, "StartTimeout": 10000, "AllowPartialMapping": null, "AdminUsername": null, "AdminPassword": null, "AdminAzureADTenant": null, "AdminAzureADAudience": null, "RequestLogExpirationDuration": null, "MaxRequestLogCount": null, "CorsPolicyOptions": null, "AllowCSharpCodeMatcher": null, "AllowBodyForAllHttpMethods": null, "AllowOnlyDefinedHttpStatusCodeInResponse": null, "DisableJsonBodyParsing": null, "DisableRequestBodyDecompressing": null, "DisableDeserializeFormUrlEncoded": null, "HandleRequestsSynchronously": null, "ThrowExceptionWhenMatcherFails": null, "CertificateSettings": null, "CustomCertificateDefined": false, "ClientCertificateMode": 0, "AcceptAnyClientCertificate": false, "WebhookSettings": null, "UseRegexExtended": true, "SaveUnmatchedRequests": null, "DoNotSaveDynamicResponseInLogEntry": null, "QueryParameterMultipleValueSupport": null } 2023-07-19 8:00:42 PM [Info] : Server using .NET Framework 4.6.1 or higher 2023-07-19 8:00:42 PM [Info] : The Static Mapping folder 'C:\MockServer\bin\Debug\__admin\mappings' does not exist, reading Static MappingFiles will be skipped. Press any key to stop the server 2023-07-19 8:00:50 PM [Error] : Providing a Response for Mapping 'dafb6c48-6a92-401b-8007-b7fb287588b2' failed. HttpStatusCode set to 500. Exception: System.TypeInitializationException: The type initializer for 'WireMock.Util.TinyMapperUtils' threw an exception. ---> System.IO.FileLoadException: Could not load file or assembly 'TinyMapper, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. A strongly-named assembly is required. (Exception from HRESULT: 0x80131044) at WireMock.Util.TinyMapperUtils..ctor() at WireMock.Util.TinyMapperUtils..cctor() --- End of inner exception stack trace --- at WireMock.Util.TinyMapperUtils.get_Instance() at WireMock.Server.WireMockServer.SettingsGet(IRequestMessage requestMessage) at WireMock.ResponseProviders.DynamicResponseProvider.ProvideResponseAsync(IMapping mapping, IRequestMessage requestMessage, WireMockServerSettings settings) at WireMock.Mapping.ProvideResponseAsync(IRequestMessage requestMessage) at WireMock.Owin.WireMockMiddleware.<InvokeInternalAsync>d__9.MoveNext() 2023-07-19 8:00:50 PM [DebugRequestResponse] : Admin[True] { "Guid": "88b09893-2829-4821-a01d-f6775dadc672", "Request": { "ClientIP": "::1", "DateTime": "2023-07-19T20:00:50.824846Z", "Path": "/__admin/settings", "AbsolutePath": "/__admin/settings", "Url": "http://localhost:8443/__admin/settings", "AbsoluteUrl": "http://localhost:8443/__admin/settings", "ProxyUrl": null, "Query": {}, "Method": "GET", "Headers": { "Connection": [ "keep-alive" ], "Accept": [ "*/*" ], "Accept-Encoding": [ "gzip, deflate, br" ], "Host": [ "localhost:8443" ], "User-Agent": [ "PostmanRuntime/7.32.3" ], "Postman-Token": [ "d61474f4-03be-4b8d-bce3-2fd64ccf7f97" ] }, "Cookies": {}, "Body": null, "BodyAsJson": null, "BodyAsBytes": null, "BodyEncoding": null, "DetectedBodyType": null, "DetectedBodyTypeFromContentType": null }, "Response": { "StatusCode": 500, "Headers": { "Content-Type": [ "application/json" ] }, "BodyDestination": null, "Body": null, "BodyAsJson": { "Guid": null, "Status": "The type initializer for 'WireMock.Util.TinyMapperUtils' threw an exception." }, "BodyAsBytes": null, "BodyAsFile": null, "BodyAsFileIsCached": null, "BodyOriginal": null, "BodyEncoding": null, "DetectedBodyType": 2, "DetectedBodyTypeFromContentType": null, "FaultType": null, "FaultPercentage": null }, "MappingGuid": "dafb6c48-6a92-401b-8007-b7fb287588b2", "MappingTitle": null, "RequestMatchResult": { "TotalScore": 2.0, "TotalNumber": 2, "IsPerfectMatch": true, "AverageTotalScore": 1.0, "MatchDetails": [ { "Name": "PathMatcher", "Score": 1.0 }, { "Name": "MethodMatcher", "Score": 1.0 } ] }, "PartialMappingGuid": "dafb6c48-6a92-401b-8007-b7fb287588b2", "PartialMappingTitle": null, "PartialRequestMatchResult": { "TotalScore": 2.0, "TotalNumber": 2, "IsPerfectMatch": true, "AverageTotalScore": 1.0, "MatchDetails": [ { "Name": "PathMatcher", "Score": 1.0 }, { "Name": "MethodMatcher", "Score": 1.0 } ] } } ```
adam added the bug label 2025-12-29 08:29:31 +01:00
adam closed this issue 2025-12-29 08:29:31 +01:00
adam commented 2025-12-29 08:29:32 +01:00
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@StefH commented on GitHub (Jul 19, 2023):

Can you please provide a full working solution / project to show this error?

@StefH commented on GitHub (Jul 19, 2023): Can you please provide a full working solution / project to show this error?
adam commented 2025-12-29 08:29:32 +01:00
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@rmeshksar commented on GitHub (Jul 20, 2023):

Here is the project:
WireMockIssue.zip

It is a .NET 4.7.1 console application.
I just added WireMock.Net from Nuget and wrote this main function:

static void Main(string[] args)
{
	WireMockServer.Start(new WireMockServerSettings
	{
		Port = 8443,
		StartAdminInterface = true
	});

	Console.WriteLine("Press any key to stop the server");
	Console.ReadLine();
}

Now when I am making a GET request:

localhost:8443/__admin/settings

It throws error which I mentioned.

@rmeshksar commented on GitHub (Jul 20, 2023): Here is the project: [WireMockIssue.zip](https://github.com/WireMock-Net/WireMock.Net/files/12109345/WireMockIssue.zip) It is a .NET 4.7.1 console application. I just added WireMock.Net from Nuget and wrote this main function: ```csharp static void Main(string[] args) { WireMockServer.Start(new WireMockServerSettings { Port = 8443, StartAdminInterface = true }); Console.WriteLine("Press any key to stop the server"); Console.ReadLine(); } ``` Now when I am making a GET request: ``` localhost:8443/__admin/settings ``` It throws error which I mentioned.
adam commented 2025-12-29 08:29:32 +01:00
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@StefH commented on GitHub (Jul 20, 2023):

I changed to another mapper.

Can you try preview version 1.5.32-ci-17647 ?

https://github.com/WireMock-Net/WireMock.Net/wiki/MyGet-preview-versions

@StefH commented on GitHub (Jul 20, 2023): I changed to another mapper. Can you try preview version `1.5.32-ci-17647` ? https://github.com/WireMock-Net/WireMock.Net/wiki/MyGet-preview-versions
adam commented 2025-12-29 08:29:32 +01:00
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@rmeshksar commented on GitHub (Jul 21, 2023):

1.5.32-ci-17647 works fine.

Is there anything can be done for RestEase as well.
I had a lot of issues with it and the provided solution did not work for me.

I noticed if I create a console application with .NET 4.7.1 and ONLY install WireMock.Net.RestClient and Brutal.Dev.StrongNameSigner then I still get this error :
'Could not load file or assembly 'RestEase, Version=1.5.7.0, Culture=neutral, PublicKeyToken=null'

But if I install WireMock.Net as well this solution works !

In order to solve it for our project:
First I got RestEase source code and compiled it with signed mode but that did not work.
Then I got the source code of WireMock and removed signed form RestClient project and compiled.
This solution worked and it is fine for me for now but not ideal.

@rmeshksar commented on GitHub (Jul 21, 2023): 1.5.32-ci-17647 works fine. Is there anything can be done for RestEase as well. I had a lot of issues with it and the provided solution did not work for me. I noticed if I create a console application with .NET 4.7.1 and ONLY install WireMock.Net.RestClient and Brutal.Dev.StrongNameSigner then I still get this error : 'Could not load file or assembly 'RestEase, Version=1.5.7.0, Culture=neutral, PublicKeyToken=null' But if I install WireMock.Net as well this solution works ! In order to solve it for our project: First I got RestEase source code and compiled it with signed mode but that did not work. Then I got the source code of WireMock and removed signed form RestClient project and compiled. This solution worked and it is fine for me for now but not ideal.
adam commented 2025-12-29 08:29:33 +01:00
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@StefH commented on GitHub (Jan 6, 2024):

https://github.com/WireMock-Net/WireMock.Net/pull/1051

@StefH commented on GitHub (Jan 6, 2024): https://github.com/WireMock-Net/WireMock.Net/pull/1051
adam commented 2025-12-29 08:29:33 +01:00
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@StefH commented on GitHub (Jan 8, 2024):

@rmeshksar
Can you also try this version?
1.5.46-ci-18287

I did replace TinyMapper again with a different Mapper.

(RestEase I'm looking into, but no progress yet)

@StefH commented on GitHub (Jan 8, 2024): @rmeshksar Can you also try this version? 1.5.46-ci-18287 I did replace TinyMapper again with a different Mapper. (RestEase I'm looking into, but no progress yet)
adam commented 2025-12-29 08:29:33 +01:00
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@StefH commented on GitHub (May 17, 2025):

https://github.com/wiremock/WireMock.Net/pull/1299

@StefH commented on GitHub (May 17, 2025): https://github.com/wiremock/WireMock.Net/pull/1299
adam commented 2025-12-29 08:29:33 +01:00
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@StefH commented on GitHub (May 17, 2025):

@rmeshksar
Can you try preview version: 1.8.6-ci-110058?

(https://github.com/wiremock/WireMock.Net/wiki/MyGet-preview-versions)

@StefH commented on GitHub (May 17, 2025): @rmeshksar Can you try preview version: `1.8.6-ci-110058`? (https://github.com/wiremock/WireMock.Net/wiki/MyGet-preview-versions)
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