Windows error 10102 (WSAENOMORE): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:	Operating System:
Description: The namespace enumeration has no more results.

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WSAEDISCON	WSAECANCELLED

WSAENOMORE

WSAENOMORE marks the end of a Winsock namespace enumeration performed with WSALookupServiceNext. It is not evidence that the namespace provider crashed or that a network query timed out: the lookup handle simply has no further result to return.

A legacy duplicate code

Winsock 2 defines both WSAENOMORE and WSA_E_NO_MORE. Microsoft documents the first as a conflicting legacy value and recommends that applications check for both for compatibility with namespace providers. New logic should treat the two as the same terminal enumeration state.

Correct loop handling

Call WSALookupServiceNext until a result or error is returned.
On either “no more” code, stop enumeration normally.
Call WSALookupServiceEnd to release the lookup handle.
Do not retry the same Next call in a tight loop expecting a new item.

Compare this with WSANO_DATA, where a name can exist but no data matches the requested restrictions. End of enumeration and “no matching data” are different states.

Microsoft: WSALookupServiceNext · Microsoft: Winsock error codes

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