HTMLDOC Problem:

Htmldoc produced no pdf-output.
Commandline:
/usr/bin/htmldoc -t pdf13  --webpage -f /data/www/vhosts/netzwerk-rommerskirchen.de/httpdocs/typo3temp/hd_ZPE0gB - 2>/data/www/vhosts/netzwerk-rommerskirchen.de/httpdocs/typo3temp/se_AzD44T

This is the (stderr) output of the htmldoc command without the htmldoc_append parameters:
If you see no errors here please check your htmldoc_append parameters too.
sh: 1: /usr/bin/htmldoc: not found