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Unable to enable-Migrations. Throws a System.BadImageFormatException: Failed to load file or assembly

I cannot activate EF migration!

Using the package manager console, it issues the following:

PM> Enable-Migrations System.BadImageFormatException: Could not load file or assembly 'MyApp' or one of its dependencies. Index not found. (Exception from HRESULT: 0x80131124) File name: 'MyApp' ---> System.BadImageFormatException: Index not found. (Exception from HRESULT: 0x80131124) at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.LoadAssembly() at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.FindType[TBase](String typeName, Func System.Reflection.RuntimeAssembly._nLoad (AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark & stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly. PM> Enable-Migrations System.BadImageFormatException: Could not load file or assembly 'MyApp' or one of its dependencies. Index not found. (Exception from HRESULT: 0x80131124) File name: 'MyApp' ---> System.BadImageFormatException: Index not found. (Exception from HRESULT: 0x80131124) at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.LoadAssembly() at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.FindType[TBase](String typeName, Func Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark & stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName (AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark & stackMark, PM> Enable-Migrations System.BadImageFormatException: Could not load file or assembly 'MyApp' or one of its dependencies. Index not found. (Exception from HRESULT: 0x80131124) File name: 'MyApp' ---> System.BadImageFormatException: Index not found. (Exception from HRESULT: 0x80131124) at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.LoadAssembly() at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.FindType[TBase](String typeName, Func PM> Enable-Migrations System.BadImageFormatException: Could not load file or assembly 'MyApp' or one of its dependencies. Index not found. (Exception from HRESULT: 0x80131124) File name: 'MyApp' ---> System.BadImageFormatException: Index not found. (Exception from HRESULT: 0x80131124) at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.LoadAssembly() at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.FindType[TBase](String typeName, Func 2 filter, Func 2 noType, Func 3 multipleTypes, Func 3 noTypeWithName, Func multipleTypesWithName) in System.Data.Entity.Migrations.Design.ToolingFacade.GetContextTypeRunner.RunCore () in System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.Run ()

 Could not load file or assembly 'MyApp' or one of its dependencies. Index not found. (Exception from HRESULT: 0x80131124)

also:
1. My default project (in PM CONSOLE) is "MyApp"
2. The solution has only "MyApp"
3. The class inheriting from DbContext is in the section "MyApp.Models"
4. I also tried to create a new solution and then copy all classes into it, and it threw the same error

What's happening?
I once included migrations in this project in the past, but two days later I removed all migration materials from it because it was not necessary. But now I really need them

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5 answers

I finally found what the problem is!

I created a completely new solution. Then I started to copy / paste / "Include in project" every .cs from the original solution. With each paste, I tried to run the "Enable-Migrations" command. With each paste, it worked fine until it found the problematic .cs, due to which Enable-Migrations could not be launched.

Then, inside the problematic .cs (which was the controller), I started isolating the code to see what was causing the problem.

This was the code that made the difference (Enable-Migrations ok vs badimageformatexception, etc.)

  /// <summary> /// GET: /MessagesAjax/SendWithInetlab/?to=56995189711&body=bla /// </summary> [JsonHandleError] public JsonResult SendWithInetlab(string to, string body) // TODO: Delete { Inetlab.SMPP.SmppClient client = new Inetlab.SMPP.SmppClient(); client.Connect("200.54.98.222", 54002); // TODO: test if (client.Status == Inetlab.SMPP.Common.ConnectionStatus.Open) { client.Bind("blah", "pwd", Inetlab.SMPP.Common.ConnectionMode.Transmitter); if (client.Status == Inetlab.SMPP.Common.ConnectionStatus.Bound) { IList<SubmitSmResp> respList = client.Submit( SMS.ForSubmit().From("56951000001").To(to).Text(body) ); client.UnBind(); } client.Disconnect(); } return Json("bla", JsonRequestBehavior.AllowGet); }
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I had the same problem.

The reason for System.BadImageFormatException was that I had a dependency on the x64 DLL ( Magick.NET-x64.dll in my case). Forcing the project to build in 32-bit mode solved it.

  • Choose WebProject
  • Go to Properties
  • Select the Build tab
  • Change the target Platform : from x64 to Any CPU

Hope this helps someone else.

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It depends on the current output folder of your project. When changing the target platform to x64, the output folder also changes to bin \ x64 \ Debug. This was a problem for the enable-migrations cmdlet. After changing the output folder back to bin \ Debug for the x64 platform platform, everything works fine.

found at: http://entityframework.codeplex.com/discussions/438488

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I have some things that can help you ...

This message has a similar exception.

And MSDN offer similar problems (see notes below).

If I were you, I would try to follow the steps in another post and, possibly, a “Clean Solution”. It seems to me that PM was having trouble running the cmdlet due to something similar to this post, so I would check all the settings in MyApp.Properties.

Hope you find a solution.

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Try the following:

  • check that all projects in your solution that reference the Entity Framework are referenced in the same version,

  • upload any projects that do not contain code for your application, for example. installation / deployment projects or documentation and

  • Temporarily disable any Visual Studio add-ons.

Then restart Visual Studio and run the command again. Also, see if VS works as an administrator.

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Source: https://habr.com/ru/post/946318/

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