Anybody know what these errors are that I'm seeing in FuzzyORC logs

[BB]

Unexpected error in pipe to external programs.
                      Please check that all helper programs are installed
and in the correct path.
                      (Pipe Command "/usr/local/bin/jpegtopnm", Pipe exit
code 1 (""), Temporary file: "/tmp/.spamassassin428

FuzzyOCR appears to be working OK but I'm wondering what this pipe error is.
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