.TH ERROR 9P 
.SH NAME
error \- return an error
.SH SYNOPSIS
.ta \w'\fLRerror 'u
.IR size [4]
.B Rerror
.IR tag [2]
.IR ename [ s ]
.SH DESCRIPTION
The
.B Rerror
message
(there is no
.BR Terror )
is used to return an error string
describing the
failure of a transaction.
It replaces the corresponding reply message
that would accompany a successful call; its tag is that
of the failing request.
.PP
By convention, clients may truncate error messages after
.B ERRMAX-1
bytes;
.B ERRMAX
is defined in
.BR <libc.h> .