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ERROR_SXS_ASSEMBLY_IS_NOT_A_DEPLOYMENT
ERROR_SXS_ASSEMBLY_IS_NOT_A_DEPLOYMENT — The referenced assembly is not a deployment assembly required by the operation.
A Side-by-Side deployment operation received an assembly that does not have the expected deployment role. This normally indicates that the wrong manifest or package artifact was supplied to the installer or servicing workflow.
Do not attempt to relabel files in place. Use the intended deployment package and validate its manifest structure.
What to check
- Check which manifest or assembly path the deployment tool actually selected.
- Verify that the installer is using the correct artifact for installation rather than a private runtime manifest.
- Rebuild or reacquire the package if its deployment metadata is missing.
Microsoft: About Side-by-Side assemblies
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