[exim] Failure to transfer data from subprocess

I'm getting a LOT of there. It started when I changed the permissions on
the exim executable from 755 to 750 - but I changed it back to 755 and
it delivered mail for a while and then started this again. If I restart
Exim it works for a while and then reverts to the errors. What am I
doing wring?


2005-09-09 08:17:12 1EDkcq-0000xq-DO unable to set gid=501 or uid=520
(euid=12): virtual_userforward router (recipient is marc@???)
2005-09-09 08:17:12 1EDkcq-0000xq-DO internal problem in
virtual_userforward router (recipient is marc@???): failure to
transfer data from subprocess: status=0100 readerror='No such file or
directory'
2005-09-09 08:17:12 1EDkcq-0000xq-DO == marc@???
R=virtual_userforward defer (-1): internal problem in
virtual_userforward router (recipient is marc@???): failure to
transfer data from subprocess: status=0100 readerror='No such file or
directory'
2005-09-09 08:17:12 1EDkcp-0000wj-BL <=
sentto-15945187-830-1126278924-yarnlady=janet.menschel.net@???
H=localhost (pascal.ctyme.com) [127.0.0.1] P=esmtp S=618807
id=20050909151522.40309.qmail@??? for
janet@???
2005-09-09 08:17:12 1EDkcq-0000yT-AO => /nobackup/spamlog/nonspam
<bettina@???> R=mail_log_filter T=address_file
2005-09-09 08:17:12 1EDkcq-0000xq-DO => /nobackup/spamlog/ham
<marc@???> R=mail_log_filter T=address_file
2005-09-09 08:17:12 1EDkcq-0000yT-AO Frozen
2005-09-09 08:17:13 1EDkcp-0000wj-BL unable to set gid=12 or uid=47001
(euid=12): local delivery to janet <janet@???>
transport=virtual_local_delivery
2005-09-09 08:17:13 1EDkcp-0000wj-BL failed to read delivery status for
\0\janet@??? from delivery subprocess
2005-09-09 08:17:13 1EDkcp-0000wj-BL appendfile transport process
returned non-zero status 0x0100: exit code 1