SA 3.0.2 with Razor & DCC

Hi List.

I have recently installed razor & dcc and found that Razor is working
great but DCC gives errors.
Here is a snippet from a debug:

<snip>
debug: DCCifd is not available: no r/w dccifd socket found.
debug: Current PATH is:
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/
bin
debug: executable for dccproc was found at /bin/dccproc
debug: DCC is available: /bin/dccproc
debug: entering helper-app run mode
debug: setuid: helper proc 14861: ruid=501 euid=501
debug: DCC: got response: missing SMTP header lines; fatal error
debug: leaving helper-app run mode
debug: DCC -> check failed: no X-DCC returned (did you create a map
file?): missing SMTP header lines; fatal error
<snip>

Any advise on how to rectify this would be appreciated.

Platform:
Exim-4.44, 
Spamassassin 3.0.2, 
latest sa-exim patch, 
latest exiscan patch,
ClamAv.

OS: 
Redhat 8

Thanks

Tom