It isn't just 11*17 in a specific tray though, it matters about the Color (White/Yellow) type (plain/Letterhead/Heavyweight) too.
Get a screenshot of the PC sending the job with the driver open and options all selected, and a picture of the user interface and reply with them.
For instance, this is the driver for this machine showing 8.5*11 White Letterhead is chosen, and the printer only has that in tray 5, so if tray 5 was empty or not set as letterhead, the job would fail when it got to the copier.
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for posts that resolve your issues. Your feedback counts!Joe Arseneau