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CS_E_SCHEMA_MISMATCH
The schema for the software installation data in the Active Directory does not match the required schema.
CS_E_SCHEMA_MISMATCH is the failure HRESULT 2147746158 (0x8004016E, signed -2147221138) from winerror.h. The documented description is “The schema for the software installation data in the Active Directory does not match the required schema.” In practical terms, the directory schema for software-installation data does not match what the Class Store operation requires. Interpret it in the context of reading or writing legacy deployment objects across domain or product versions.
Relevant contract
These CS_E values describe the legacy directory-backed COM Class Store. Public documentation is limited; the exact owner is the component performing automatic installation or directory lookup, so traces must identify that component rather than assigning the HRESULT to every modern COM activation path.
- Associate this result with one exact operation in automatic class installation or lookup through COM Class Store policy and directory-backed software-installation objects.
- Confirm that this result came from reading or writing legacy deployment objects across domain or product versions, rather than from cleanup or a wrapper that ran afterward.
Likely cause branches
- It can result when required attributes or object classes are missing.
- It can result when a client expects a different schema revision than the directory provides.
- It can result when custom schema modifications or incomplete preparation leave incompatible definitions.
Evidence to preserve
A useful incident records the requested CLSID or ProgID, directory object DN, package identifier, version, deployment path, domain controller, schema version, policy state, bind result, and object size.
- Record client build, schema version, objectClass values, and missing attributes.
- Compare against the authoritative deployment documentation for that product version.
- Test in a schema-matched lab before making forest-wide changes.
Diagnostic sequence
- Identify the exact object, method, and lifecycle phase involved in reading or writing legacy deployment objects across domain or product versions.
Recovery and retry
Correction. use a compatible client or complete the supported schema preparation and replication process. Retry condition. Retry only after schema compatibility is established; ad hoc attribute creation is unsafe and forest-wide in scope. Before repeating the operation, determine whether directory metadata, package staging, or a local installation changed before failure and avoid deleting a directory object whose ownership is not established.
Practical scenario
A newer administration tool writes an attribute unavailable in the domain schema; using the supported older tool avoids an unsupported schema extension.
Difference from related HRESULTs
CS_E_INVALID_VERSION concerns package version content; it concerns directory object definitions and required attributes.
Developer and administrator guidance
Involve the Active Directory or software-deployment owner, verify policy and domain-controller evidence, and use the management system that created the package or class-store object.
References
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