Comment 10 for bug 59409

hp-setup uses the path stored in /etc/hp/hplip.conf to locate the fax PPD file. For example:

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/HP
ppdbase=/usr/share/ppd
doc=/usr/share/doc/hplip-2.7.12.0
icon=/usr/share/applications
cupsbackend=/usr/lib/cups/backend
foomatic=/usr/share/foomatic

The path specified by ppd= will be used to search for the file (in this case/usr/share/ppd/HP) . If this path is incorrect, the file will not be found. This path is setup during 'make install' and can be specified in the './configure' using the '--with-hpppddir=DIR' option (see http://hplip.sourceforge.net/tech_docs/tarball_install.html).