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COMADMIN_E_DLLREGISTERSERVER
COM registration, type library, and component installation: exact meaning of COMADMIN_E_DLLREGISTERSERVER
The component DLL DllRegisterServer entry point returned failure during installation. InstallComponent loads the in-process server and asks its self-registration routine to register COM metadata.
Windows describes this condition as “DllRegisterServer failed on component install”.
Evidence to collect before repair
- Record CLSID/IID/LIBID values and 32/64-bit registry view.
- Preserve component, type-library, and proxy/stub paths with hashes; it anchors the failure to the real administration object.
- Evidence should include loader or DllRegisterServer/DllGetClassObject result, captured before a repair changes state.
- Collect COM+ installation ErrorInfo and relevant event records when diagnosing this result; without it the symbolic HRESULT is underdetermined.
Where the result occurs
The COM+ catalog presents a split view of RegDB and Windows class/type-library registration, so the failing stage must be identified before editing either store. In the specific case of this result, capture the HRESULT returned by DllRegisterServer, loader diagnostics, dependencies, architecture, privileges, and registry changes attempted.
Diagnostic sequence
- To isolate this result, verify the exact binary architecture and dependencies.
- load and inspect the matching type library without substituting another version.
- repair registration using the component installer.
- The next diagnostic action is to install rather than import when full interface metadata is required.
- To isolate it, repopulate the catalog and test class activation after repair.
Retry and recovery
Correct the component installer or dependencies and reinstall; do not ignore the registration failure and create catalog entries manually.
Practical administration scenario
A component loads successfully but DllRegisterServer cannot write a required machine-wide registration key.
Difference from nearby COMADMIN results
COMADMIN_E_DLLLOADFAILED means the DLL could not be loaded, whereas this code means loading reached DllRegisterServer and that call failed.
Official Microsoft references
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