HP 7800 keeps saying 'out of paper' on Mac...?? It is NOT out of paper... !

[PrintyDoc]

My printer keeps reporting 'out of paper' on my Mac. The pc's don't receive such a message. When I run the HP print doctor (on windows, no iOS  version) it finds the same fault (out-of-paper). So apparently the printer is reporting to the netword it is out of paper but it isn's. It also doesn't report this on the touch screen. 
Printer driver is up to date. Software on mac and pc's is up to date...
I am at a loss. 
What is going on here? Hardware issue? (also wiped the rollers with a soft cloth, to no avail... printer is 3 months old)

[KrazyToad]

@PrintyDoc

I have gone through your Post and I understand your concerns

We could try a Semi Full Reset on the printer

Since these steps are specific to your printer, I have sent you a private message with the instructions

Please check your private message icon on the upper right corner of your HP Forums profile.

Next to your profile Name, you should see a little blue envelope

Thank you

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.