Default paper tray HP E50145

[Nigel_Bigg]

We have a customer trialing the  HP Laserjet E50145 currently using Kyocera printers. They have an app they use to print tickets from mobile devices. The tickets print out on perforated paper from a 2nd paper tray. The app talks to a Citrix system at head office that then sends the job to a local pc with the printer shared from the local PC. No matter what we try the HP printer ALWAYS wants to use the MP tray. I have tried using the Kyocera driver that was originally installed, I have tried other generic drivers, The HP E50145 driver won't even accept the job, but the HP UPD accepts it and again asks for the paper to be put in the MP tray. No matter what settings I use in the UPD driver the machine always wants to use the MP tray. I have tried setting the defaults & preferences in the driver to be tray 3 and when i send test page from the PC (printer properties/print test page) the test page will come from tray 3, but as soon as we send the ticket job it asks for plain paper in tray 1 (MP tray). I have also set the default paper type to prepunched again the test page wants prepunched paper from tray 3 but the ticket still wants plain paper from tray 1. This makes me think the problem is not the driver it must be the default setting at the machine how do I make the machine to default to a different paper tray?

[Repairatrooper]

What paper is the job programmed to print on? HP will default to MP tray if a print job requests a paper type that is not currently loaded. The two work arounds are to have a tray set to the paper type that is being requested or find a way to set the driver to demand a particular tray.

[Nigel_Bigg]

Hi thanks for the suggestions,  it doesn't matter what paper is specified in the driver the machine always asks for A4 plain paper when this job tries to print, it appears this particular job (which is coming from the backend of their system) doesn't specify anything . Any changes I make at the driver are ignored by this job, if we can force the machine to print from Tray 3 by default (at the machine NOT the driver) then the problem would be solved. This was working ok on their Kyocera printer, I also pointed the HP driver to a little canon MFP that they have in the office and that works fine too.