Could not Load File or Assembly ‘XMPro.Client Integration’ or one of its Dependencies. An Attempt was Made to Load a Program with an Incorrect Format

Issue

An unhandled exception occurred during the execution of the current web request.

Please review the stack trace for more information about the error and where it originated in the code.

Exception Details

System.BadImageFormatException: Could not load file or assembly ‘XMPro.ClientIntegration’ or one of its dependencies.

An attempt was made to load a program with an incorrect format.

Resolution

The error is being returned because you are trying to run something in an x64 instead of an x86 environment.

Anytime you see a “System.BadImageFormatException” it means you’re running within x64 instead of an x86 environment.

Check the application pool if on a Server 2008 R2 is setup to Enable 32bit mode.