PIXMA iP8720 won't print envelopes

[aubiedoll]

I have loaded envelopes tray of my new iP8720 per directions,  but when I try to print, I get a warning light

and a prompt saying "There is no paper in the upper tray"  What am I missing?

I am operating on MAC OS X Yosemite Version 10.10.5

Please help!!

[Shirleyr9147]

I have a Canon Pixma IP7260 printer and I have the same problem. I have the envelopes in the correct places.

[clmallow]

Why isn't anyone with Canon responding to this freaking issue???  This is a pretty **bleep** big deal!  EXTREMELY ANNOYED BY THIS!

[SamanthaW]

Hi!

Welcome to the Canon Forums and thanks for your post! The Canon Community Forum is not intended for immediate response from Canon USA, it's intended to be a place where contributors can come together to help with general issues. 

To have a better understanding of your issue, please let everyone know what operating system (Windows Vista/7/8 or Mac OS 10.X) you are using and if you are connected via USB or WI-FI. That way, the community will be able to assist you with suggestions appropriate for your product.

If this is a time-sensitive matter, our US-based technical support team is standing by, ready to help 24/7 via email at http://Canon.us/ContactCF or by phone at 1-800-OK-CANON (1-800-652-2666) weekdays between 10 AM and 10 PM ET (7 AM to 7 PM PT).

Thanks!