.TH ERROR 5 
.SH NAME
error \- return an error
.SH SYNOPSIS
.ta \w'\fLTerror 'u
.B
Rerror
.IR tag [2]
.IR ename [64]
.SH DESCRIPTION
The
.B Rerror
request
(there is no
.BR Terror )
is used to return an error string, of length 64
.RB ( ERRLEN
in
.BR <libc.h> ),
describing the
failure of a transaction.
It replaces the corresponding reply message
that would accompany a successful call; its tag is that
of the request.