Transport endpoint is not connected

I’m getting the following error sporadically in my Procmail log:

/home/stevepersonal/local/bin/spamassassin: /home/stevepersonal/local/bin/spamassassin: Transport endpoint is not connected

Anyone know what that could be about? I contacted support and they essential said everything looks fine so you’re on your own with spamassassin. This error only sporadically happens and started happening out of the blue with no changes on my part, so I figured it was something at DreamHost’s end. Now I’m stuck because I have no idea what the problem could be. Anyone got a clue?