IIS 7.5 Fixing An attempt was made to load a program with an incorrect format problem?

by

Found the problem – The solution is in the way that the two AppPools are configured:

  • Default Website/my_app is using DefaultAppPool where Enable 32-Bit applications is TRUE
  • Beta/my_app -> BetaAppPool is using Enable 32-Bit applications is FALSE

Changing BetaAppPool to set Enable 32-Bit applications to TRUE has fixed this problem.

Solution was found by @Rick on this question: C# Entity Framework 4 Common Language Runtime detected an invalid program error?

More Related Contents:

  1. Different text editor in .net development environment [closed]
  2. How do I get the contents of a JSON file I added in the StartUp method to use it in one of my actions?
  3. How to detect Windows 64-bit platform with .NET?
  4. How to read AppSettings values from a .json file in ASP.NET Core
  5. Reading 64bit Registry from a 32bit application
  6. How can you change Network settings (IP Address, DNS, WINS, Host Name) with code in C#
  7. Loading custom configuration files
  8. Performance differences between debug and release builds
  9. How to implement a ConfigurationSection with a ConfigurationElementCollection
  10. C# – How to get Program Files (x86) on Windows 64 bit
  11. How to find if a native DLL file is compiled as x64 or x86?
  12. Visual Studio “Could not copy” …. during build
  13. Silent failures in C#, seemingly unhandled exceptions that does not crash the program
  14. Use XML includes or config references in app.config to include other config files’ settings
  15. app.config for a class library
  16. IIS Server & ASP.Net Core – 500.19 with error code 0x8007000d on httpplatformhandler tag
  17. sizeof(int) on x64?
  18. Change connection string & reload app.config at run time
  19. ASP.NET MVC Routing – add .html extension to routes
  20. System.BadImageFormatException: Could not load file or assembly [duplicate]
  21. Build Visual Studio project through the command line
  22. Programmatically encrypting a config-file in .NET
  23. .net Framework Error (HRESULT 0x8007000B)
  24. Memory limitations in a 64-bit .Net application?
  25. How to get all sections by name in the sectionGroup applicationSettings in .Net 2.0
  26. VS2005 C# Programmatically change connection string contained in app.config
  27. How to write to the main exe’s .config userSettings section?
  28. Visual Studio 2010: How to enforce build order of projects in a solution?
  29. ASP.NET Core configuration for .NET Core console application
  30. Should I compile release builds with debug info as “full” or “pdb-only”?

Leave a Comment