Do you have the package libsane-hpaio installed?
Check with the command
dpkg -l | grep libsane-hpaio
Check also:
ls -l /usr/share/hplip/models/models.dat ls -l /usr/share/hplip/data/models/models.dat
If you have only the latter and not the former, do
mkdir -p /usr/share/hplip/models/ ln -s /usr/share/hplip/data/models/models.dat /usr/share/hplip/models/
Does this solve your problem?
Do you have the package libsane-hpaio installed?
Check with the command
dpkg -l | grep libsane-hpaio
Check also:
ls -l /usr/share/ hplip/models/ models. dat hplip/data/ models/ models. dat
ls -l /usr/share/
If you have only the latter and not the former, do
mkdir -p /usr/share/ hplip/models/ hplip/data/ models/ models. dat /usr/share/ hplip/models/
ln -s /usr/share/
Does this solve your problem?