HRESULT 0x80010101 (RPC_E_OUT_OF_RESOURCES): meaning and diagnosis

Status / error code:

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Constant name:

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Description:

COM could not allocate a runtime resource required to process the call, such as memory or a handle.

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RPC_E_SYS_CALL_FAILED	RPC_E_ATTEMPTED_MULTITHREAD

RPC_E_OUT_OF_RESOURCES

RPC_E_OUT_OF_RESOURCES means that COM could not obtain a required runtime resource, such as memory, handles, or synchronization objects, while processing the call.

How to investigate

Check process memory, handle counts, desktop heap, and system resource pressure near the failure.
Look for leaked interface references, events, handles, or queued calls.
Avoid retry storms that create more outstanding work while the runtime is resource-constrained.

If the failure is intermittent, capture resource counters over time rather than relying only on a single snapshot.

Microsoft: COM error codes

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