procmail: Lock failure on "spamc.lock"

[Mike Vanecek <sp...@mm-vanecek.cc>]

My setup

Running spamassassin-3.0.2-1 with Postfix postfix-2.0.19-1.pcre.sasl2.tls.rh9
on RH 9

Using spamd with the following options
# Set default spamd configuration.
SPAMDOPTIONS="-d -c -m5 -H -s local4"

Using the clamav plugin

/etc/procmailrc is
# SpamAssassin procmailrc
SENDMAIL=/usr/sbin/sendmail
LOGFILE=/var/log/procmail.log
LOGABSTRACT=all
COMSAT=no
VERBOSE=yes
DROPPRIVS=yes
  
:0fw: spamc.lock
* < 256000
 | spamc

I then get in my procmail log

procmail: Lock failure on "spamc.lock"

If I remove spamc.loci then I get 

procmail: Couldn't determine implicit lockfile from "spamc"
procmail: Lock failure on ".lock"

I have searched all the logical places but have not found the answer. Would
some kind soul please tell me what I need to change or point me to the answer.

Thank you.