| Previous | Next |
| OLE_E_ADVF | OLE_E_ENUM_NOMORE |
TAPI_E_NOTENOUGHMEMORY
TAPI output buffer is too small
TAPI_E_NOTENOUGHMEMORY is HRESULT 2147745793 (0x80040001) from TAPI 3.0. The documented description is “The buffer passed in to this method was not big enough.” The result belongs to a TAPI 3 method returning variable-length information through a caller-provided buffer. This HRESULT is most useful when tied to the method and lifecycle phase where the supplied buffer cannot hold the complete result, despite the legacy constant name suggesting general memory exhaustion.
This result means that the supplied buffer cannot hold the complete result, despite the legacy constant name suggesting general memory exhaustion.
Where the result appears
- This result can surface in a TAPI 3 address, call-control, terminal, stream, conference, dialing, or completion-management code.
- Map the failure to one concrete operation among ITTAPI, ITAddress, ITBasicCallControl, ITCallInfo, terminal and stream interfaces, provider events, and asynchronous request state.
- Preserve provider name and version, address and call IDs, device class, media type, privilege, current address and call states, and asynchronous request ID before releasing or replacing the object that returned this result.
An incident record must distinguish caller, runtime, provider, and backing resource while testing whether the supplied buffer cannot hold the complete result, despite the legacy constant name suggesting general memory exhaustion.
Typical causes and interpretation
The immediate contract boundary is specific: the supplied buffer cannot hold the complete result, despite the legacy constant name suggesting general memory exhaustion. Common cause branches include the following:
- The caller used a fixed buffer.
- The required size changed between query and retrieval.
- Structure-size and character-width calculations disagree.
Confirm the cause branch that explains why the supplied buffer cannot hold the complete result, despite the legacy constant name suggesting general memory exhaustion by using call arguments, object state, metadata, device information, or provider traces.
Correct handling and recovery
The primary recovery is to read the required size when available, allocate with overflow checks, and repeat the retrieval without changing the logical request. The failure report should capture the relevant state during a TAPI 3 method returning variable-length information through a caller-provided buffer so it is clear why the supplied buffer cannot hold the complete result, despite the legacy constant name suggesting general memory exhaustion.
The owner of it must define idempotency, cancellation, attempt limits, and reconciliation for the failed a TAPI 3 method returning variable-length information through a caller-provided buffer.
Practical scenario
A telephony client requests address information into a legacy fixed array, then switches to a two-pass size query and retrieval.
Difference from related HRESULTs
E_OUTOFMEMORY means allocation failed; it commonly means the method buffer is too small
Developer and administrator guidance
Use a controllable service provider or simulator to cover state races, capability differences, device removal, cancellation, and provider restart.
Broad permission or compatibility changes are inappropriate unless evidence for the supplied buffer cannot hold the complete result, despite the legacy constant name suggesting general memory exhaustion points to that layer.
References
Looking for a different code? Search another status or error code.