my MacBook air is giving me an error message when i try to scan but no problem printing -21345

[nanny1313]

I can print from my MacBook air to my printer office jet pro 8710.  But when i try to use the scanner it tells me it can't connect and error message -21345.

[zoey7886]

@nanny1313, Welcome to the HP Support Community!  

Thanks for reaching out about your query regarding a scanner error! 

We're thrilled to have the opportunity to assist you and provide a solution.  

Let's try a power reset on the printer-

Reset the product

1. With the printer turned on, disconnect the power cord from the rear of the printer.
2. Unplug the power cord from the wall outlet.
3. Wait at least 60 seconds.
4. Plug the power cord back into the wall outlet.
5. Reconnect the power cord to the printer.
6. Turn the printer on. HP recommends plugging the printer directly into a wall outlet.

Try and scan, if the issue persists try the below steps.

try updating the printer's firmware - HP Printers - Updating or Upgrading Printer Firmware 

Update mac-How to update the software on your Mac

Hope this helps! Keep me posted.   

Take care, and have an amazing day!  

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Regards,