Spamtrainer error - binary operator expected

Question

On 10.4 server, this error started showing up. No updates were installed. Hoping to fix this, I even installed updated spamtrainer. But it did not help.
At the command line, I typed this:
/usr/sbin/spamtrainer -p col -d
(where col is the partition name)
Starting spamtrainer...
Training from user folders
/usr/sbin/spamtrainer: line 1021: [: /Volumes/Users/user_name/Mails: binary operator expected
/usr/sbin/spamtrainer: line 1028: [: /Volumes/Users/user_name/Mails: binary operator expected
Either there is no mailbox called user/junkmail in the mailpartition col
or it has never been fed with mail.
/usr/sbin/spamtrainer: line 1050: [: /Volumes/Users/user_name/Mails: binary operator expected
Either there is no mailbox called user/notjunkmail in the mailpartition col
or it has never been fed with mail.
Syncing SpamAssassin Database
Displaying SpamAssassin Database Stats
0.000 0 8860 0 non-token data: spam
0.000 0 40718 0 non-token data: ham
Deleting learned HAM and SPAM
Done!
Output produced by spamtrainer Version 1.8.5
There are mailboxes junkmail and notjunkmail. Junkmail is always fed. I don't understand why it is going to /Volumes/Users/user_name/Mails and shouting "binary operator expected".
Appreciate any help.
Thanks !

Answer 1

/etc/imapd.conf:
admins: cyrusimap, serveradmin
configdirectory: /var/imap
partition-default: /var/spool/imap
unixhierarchysep: yes
altnamespace: yes
servername: our_domain.net
sievedir: /usr/sieve
sendmail: /usr/sbin/sendmail
lmtpdowncasercpt: 1
tlscertfile: /etc/certificates/our_domain.crt
logrollingdays: 1
logrolling_daysenabled: true
enablequotawarnings: yes
lmtpover_quota_permfailure: yes
tlskeyfile: /etc/certificates/our_domain.key
popauthgssapi: yes
popauthapop: yes
imapauth_crammd5: yes
imapauthgssapi: yes
imapauthlogin: yes
imapauthplain: yes
tlscafile: /etc/certificates/our_domain.chcrt
partition-col: /Volumes/Users/serveradmin/Mails
Message was edited by: Chakravarthy Cuddapah