Postfix unable to locate opendmarc.sock file

[bobby]

I see this error message in my mail.log file:
Nov 11 19:37:52 mail postfix/smtpd[5942]: warning: connect to Milter
service local:opendmarc/opendmarc.sock: No such file or directory
In the main.cf file, I have this line:
smtpd_milters = local:opendkim/opendkim.sock,local:opendmarc/opendmarc.sock,
local:spamass/spamass.sock