errno 76 (ENOTUNIQ): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: a legacy network namespace reports that a name is not unique.

Could be also:
Constant	Type	OS
EPROCUNAVAIL	errno	Mac
FATAL_UNHANDLED_HARD_ERROR	BugCheck Code	Windows

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EPROGMISMATCH	EPROCUNAVAIL

ENOTUNIQ

ENOTUNIQ means “Name not unique on network”. It belongs to older networked-system errno vocabulary rather than to common DNS or TCP error reporting. On Linux it is most useful when diagnosing compatibility layers, distributed filesystems, or old service-registration code.

The important evidence is the naming scope used by the failing subsystem. Preserve the service name, node name, export name, or remote resource identifier and check whether the layer requires a unique registration in that scope.

Compare with

EADDRINUSE: a local socket address is already in use.
EEXIST: a filesystem or namespace entry already exists.
EADV: a legacy advertise operation failed.
EREMCHG: a remote address changed after a resource was known.

Linux errno(3) · Linux UAPI errno definitions

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