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ERROR_SXS_INVALID_ACTCTXDATA_FORMAT
ERROR_SXS_INVALID_ACTCTXDATA_FORMAT means that Windows received malformed activation-context data while attempting side-by-side binding. The failure can involve an embedded manifest resource, an external manifest, or data supplied through an activation-context API.
What to check
- Verify that the executable or DLL contains the intended manifest resource and that packaging did not truncate or replace it.
- Inspect the exact manifest file or resource named by the SideBySide trace instead of assuming the application executable is at fault.
- Rebuild generated manifests and deployment artifacts from a clean source if binary-resource corruption is possible.
Correct the malformed input rather than trying to continue with a partially created activation context.
Microsoft: activation context reference
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