What does errno 72 (EMULTIHOP) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: a remote or distributed path required an unsupported multihop operation.

Could be also:
Constant	Type	OS
ERROR_REDIR_PAUSED	Win32 error	Windows
EBADRPC	errno	Mac
ELOCKUNMAPPED	errno	Solaris
CANCEL_STATE_IN_COMPLETED_IRP	BugCheck Code	Windows

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EPROTO	EBADRPC

EMULTIHOP

EMULTIHOP reports that a multihop operation was attempted. It is relevant to remote or distributed path resolution where an operation would need to pass through more than one remote hop or forwarding boundary that the layer does not support.

On Linux this is uncommon in ordinary local filesystem and socket code. If it appears, focus on mount stacking, automounts, remote namespace layout, protocol gateways, and compatibility layers that translate remote path traversal failures into traditional errno names.

Useful checks

Identify every mount, automount, bind mount, and remote hop in the failing path.
Check whether the protocol supports crossing referrals, exports, or remote roots.
Compare with EXDEV for local cross-device limits and ENOLINK for severed links.

POSIX errno.h · Linux errno(3) · Linux UAPI errno definitions

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