I am getting this error:
failed to open device 'hpaia:/net/HP_LASERJET_M1356dnf_MFP
when using xsane, which sounds as if it has been reported
This thread says that it has been fixed in latest hplip
https://bugs.launchpad.net/hplip/+bug/1015319
but this one says may need more?
https://answers.launchpad.net/hplip/+question/152542

My current hplip is 3.12.2-1
so I just need to download from hp and install?3.12.11