What does Windows error code 14017 (ERROR_SXS_INVALID_ASSEMBLY_IDENTITY_ATTRIBUTE) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: An assemblyIdentity attribute has an invalid value for SxS binding.

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ERROR_SXS_INVALID_ASSEMBLY_IDENTITY_ATTRIBUTE

ERROR_SXS_INVALID_ASSEMBLY_IDENTITY_ATTRIBUTE means that an assemblyIdentity attribute has a value that is invalid for side-by-side binding. Assembly identity attributes determine what Windows looks for, so even a small typo in version, architecture, language, or token data can prevent resolution.

What to check

Validate every assemblyIdentity attribute against the documented manifest schema.
Compare the requested identity with the identity declared by the installed or privately deployed assembly manifest.
Avoid editing version or architecture attributes manually after signing or packaging the application.

The correct fix is to make the declared identity match a real compatible assembly, not to weaken identity checking.

Microsoft: application manifests

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