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ERROR_SXS_INVALID_ASSEMBLY_IDENTITY_ATTRIBUTE_NAME
ERROR_SXS_INVALID_ASSEMBLY_IDENTITY_ATTRIBUTE_NAME — An assembly identity uses an attribute name that is not a valid XML name.
The manifest was parsed far enough to find an assembly identity, but one of its attribute names violates XML naming rules. This is usually a typo or an incorrectly generated manifest.
Fix the manifest source and redeploy the signed package; editing a deployed system manifest is not a supported fix.
What to check
- Use sxstrace to locate the manifest and the exact identity block.
- Compare attribute names with the Side-by-Side manifest reference.
- Regenerate the manifest with an XML-aware tool to avoid hidden invalid characters.
Microsoft: About Side-by-Side assemblies
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