errno 44 (ECHRNG) in Linux: meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: ECHRNG is a legacy Linux errno meaning legacy channel number outside the accepted range.

Could be also:
Constant	Type	OS
KERN_RPC_TERMINATE_ORPHAN	Kern return	Mac
ippStsPrevLibraryUsed	Intel Ipp Status	Any
ESOCKTNOSUPPORT	errno	Mac
EL2HLT	errno	Solaris
PORT_DRIVER_INTERNAL	BugCheck Code	Windows

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ENOCSI	ESOCKTNOSUPPORT

ECHRNG

ECHRNG: Linux legacy errno

ECHRNG (errno 3) reports that a legacy channel number is outside the range accepted by the driver or compatibility interface. These names come from historical System V/XENIX compatibility interfaces; on modern Linux they usually point to a driver, STREAMS-compatibility layer, or legacy IPC contract rather than a general filesystem error.

Evidence to capture

Record channel number, configured channel count, device identity, and request type.

Focused test

compare the failing channel with a known-valid channel on the same device.

Correction

use a configured channel ordinal or correct the channel table.

Verification

Repeat the original system call and confirm it passes the former ECHRNG boundary with the same object identity.

Technical references

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