PIXMA TS6120 printer won't print from cassette tray

[Dave5]

I get the message:

"Support Code                        1000

There is no paper in the rear tray.

Check the following, than load paper and select (OK).

-Align paper guides with the paper.

How to clear               OK"

I don't want to print from the rear tray; I want to print from the cassette tray. I do select the cassette paper type yet the message, above, is always the same. Support Code 1000 just tell how to load the cassette tray.

HELP, please

Dave5

[gb901]

is is bloody useless. Canon sort this out as its thoroughly cheesing me off and makes me want to hurl this piece of sh@t printer at the wall: I WANT TO PRINT FROM THE CASSETTE NOT THE REAR!

[gb901]

Well done that man👍

Still this needs sorting by canon

[gb901]

 has been posted before but works a treat: 

I gave a Kudo to the person who posted this a while ago. This was the solution that worked for me :
https://support.usa.canon.com/kb/index?page=content&id=ART174811&cat=MEGATANK_INKJET_PRINTERS&actp=L...

[Keeperken]

My MG5300 has inexplicably switched to the rear tray occasionally.  I just printed a 14 page doc from Google Drive on Chrome.  Not certain which tray it was using this time but after 3 pages it gave me an error that the rear tray didn't have paper.  It did.  I fiddled with it and restarted the job a bunch of times.  I found the Feed setting in Setup and made certain that it was on Cassette.  The Printer settings for the job does not have any options about the Feed.  I also turned the printer off and on.  Nothing works.  Help.