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Error "Failed to upload file" but I did not ask for it

Update: I recompiled for x86 and it works now. but I still need to know what happened here and why I need to recompile all my .net applications to x86 ... I have never used oracle and I have no plans to do so in the future. why does this create problems?

Since this morning, I cannot run all my .net programs that use entityframework-v5 file to connect to msSqlServer, I have inserted the stack error below.

I tried the same files from another computer on the network, it works correctly. so I suspected it was a windows update that caused the problem overnight, so I restored the system, still the same problem.

Now I'm out of ideas. I do not use oracle and I have no mention of it. and as I said, the same files in the same folder worked on my computer yesterday and they also work from other computers on the network today.

    System.BadImageFormatException: Could not load file or assembly 'System.Data.OracleClient.dll' or one of its dependencies.  is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName)
   at System.Type.GetType(String typeName)
   at System.Data.Common.DbProviderFactories.IncludeFrameworkFactoryClasses(DataTable configDataTable)
   at System.Data.Common.DbProviderFactories.Initialize()
   at System.Data.EntityClient.EntityConnection.GetFactory(String providerString)
   at System.Data.EntityClient.EntityConnection.ChangeConnectionString(String newConnectionString)
   at System.Data.Entity.Internal.LazyInternalConnection.Initialize()
   at System.Data.Entity.Internal.LazyInternalConnection.CreateObjectContextFromConnectionModel()
   at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
   at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
   at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
   at System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider()
   at System.Linq.Queryable.Where[TSource](IQueryable`1 source, Expression`1 predicate)
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I have no answer to my problem. I have spent several days trying to fix this issue with no success.

I reinstalled all windows and fixed the problem.



I really hope this doesn't happen again, installing windows (and reinstalling all programs) is not something I want to do often ...

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This question indicates that you have 32-bit Oracle Client Components installed on your machine.

Your stack trace shows the following:



  • You are starting an Entity Framework activity.
  • Entity Framework wants to read your connection string.
  • All database providers installed on your system must be initialized.
  • He finds Oracle and tries to download it.
  • It fails because the dependencies don't support 64 bit.

You must either uninstall the Oracle Client completely, making sure no other software depends on it, or additionally install the 64-bit version as mentioned in the answer above.

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