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ERROR_SXS_DUPLICATE_ASSEMBLY_NAME
ERROR_SXS_DUPLICATE_ASSEMBLY_NAME — The manifest dependency graph contains different versions of the same component where only one version is allowed.
Windows found two assemblies with the same identity name but incompatible versions in one activation context. This can occur when an application mixes private components from different releases or uses an incorrect binding policy.
The error is about the manifest dependency closure, not simply about a missing DLL.
What to check
- Use sxstrace to identify the two competing assembly identities, including version and processor architecture.
- Reinstall the application or its runtime package so the manifest and private assembly files come from the same release.
- For application developers, correct the dependency or policy manifest rather than attempting to load both versions in one activation context.
Microsoft: Application manifests
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