Release website not recognising reference

Question

My local website works fine.

I have uploaded the website to the server. All of the DLLs are in the bin directory, but I still get the missing reference error as you can see in the following image:

The 'missing' reference is not directly used by the website, but rather is required by a library that the website uses.

My configurations are:

Server:

• Windows Server 2008 R2 x64
• IIS 8
• .NET 4.5

Local:

• Windows 8.1 Pro x64
• Visual Studio 2013 Pro
• IIS Express

Answer 1

CodeCaster gave the hint above. The website was set to run as x64, but was trying to load a x86 binary.

To fix this, I:

• Highlighted the website's application pool
• Clicked 'Advanced Settings'
• Set 'Enable 32-bit Applications' to true