Cannot create + lock headers file

[Stephen Lee]

I've installed the RPM version of MS 4.10-1 on a
Redhat7.1/Sendmail/Sophos box. The installation seems to be fine. Upon
receipt of a message, syslog reports the following errors:

Cannot create + lock headers file
/var/spool/MailScanner/incoming/1269/gBEITk401272.header,  at
/usr/lib/MailScanner/MailScanner/Message.pm line 237
Cannot create + lock headers file
/var/spool/MailScanner/incoming/1267/gBEITk401272.header,  at
/usr/lib/MailScanner/MailScanner/Message.pm line 237
Cannot create + lock headers file
/var/spool/MailScanner/incoming/1265/gBEITk401272.header,  at
/usr/lib/MailScanner/MailScanner/Message.pm line 237
Cannot create + lock headers file
/var/spool/MailScanner/incoming/1263/gBEITk401272.header,  at
/usr/lib/MailScanner/MailScanner/Message.pm line 237
Cannot create + lock headers file
/var/spool/MailScanner/incoming/1259/gBEITk401272.header,  at
/usr/lib/MailScanner/MailScanner/Message.pm line 237


Mailscanner appears to be trying to write the header file to a
subdirectory of /var/spool/MailScanner/incoming (1269) which doesn't
exist. Is there something in mailscanner.conf I should be adjusting?

Thanks,
Stephen