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CO_E_INIT_MEMORY_ALLOCATOR
COM memory allocator initialization failed
CO_E_INIT_MEMORY_ALLOCATOR is HRESULT 2147500040 (0x80004008) from winerror.h. The documented description is “Get memory allocator failure.” The value must be interpreted at the COM runtime allocator setup performed before normal activation and marshaling.
COM could not obtain a usable memory allocator for runtime-owned allocations. Keep the symbolic name beside the raw hexadecimal value so later analysis does not collapse the result into an unrelated COM family.
Where the result appears
- This result may surface in the COM runtime allocator setup performed before normal activation and marshaling.
Determine the object and lifecycle phase that owned this result; a UI symptom cannot establish whether the origin was the caller, proxy, runtime, server, or metadata producer.
Typical causes and interpretation
Common cause categories are: memory is exhausted; a heap hook returns invalid behavior; startup ordering corrupts allocator state; process address space is constrained. Evaluate these branches independently and require evidence from the owning API before promoting one branch to the root cause.
Key distinction: COM could not obtain a usable memory allocator for runtime-owned allocations.
Correct handling and recovery
The appropriate recovery is to remove unsupported allocator interception, diagnose heap corruption or resource exhaustion, and restart the process after correcting the environment. The owner of retry must define idempotency, refreshed state, maximum attempts, backoff, and cancellation responsibility.
After this result, apply the API-specific validity rules to outputs and release only resources whose ownership transferred during this attempt.
Practical scenario
A test host injects a custom heap shim that violates alignment requirements, preventing COM startup until the shim is removed.
A regression test should force the relevant precondition, assert native outputs, fix only that condition, and confirm the expected neighboring result.
Difference from related HRESULTs
E_OUTOFMEMORY can occur during an ordinary operation; it means the allocator itself failed during COM initialization.
References
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