[Dovecot] Problem with a sieve file

[Nicolas Letellier]

Hello,

I use a simple sieve file like:
require "fileinto";

if header :contains ["From"] ["root"] {
   redirect "test at domain.com";
}

When I send an email with root to this user, I have this error in my 
deliver log:
Mar 12 09:43:18 helm deliver(user at domain.net): 
open(~/.temp.hostname.net.53398.23c1b1a363c2c4e8) failed: No such file 
or directory
Mar 12 09:43:18 helm deliver(user at domain.net): 
msgid=<20080312084317.C01BD37FEC13 at hostname.com>: forwarded to 
<test at domain.com>

Why I have this error? I don't understand it.

I use dovecot with Postfix (2.4) and FreeBSD (6.2) :
dovecot-1.0.12        Secure and compact IMAP and POP3 servers
dovecot-sieve-1.0.2 A sieve plugin for the Dovecot LDA called 'deliver'

See my config a sieve in my dovecot.conf:

mail_plugins = cmusieve quota (in protocol lda)
sieve = /var/mail/vmail/%u/sieve (in plugin)

Thanks for your help.

- Nicolas.