There are some things you have to be aware of when using Qimage Ultimate and probably more Qimage versions together with HP printer drivers. The interaction of QU with the HP drivers is flawed. There is little chance that will change in the near future. A good advice is to change anything directly related to the driver in the driver menu itself (Properties) and not in QU, like landscape versus portrait, roll versus manual, print page size, etc. Holding the Shift key and clicking Properties sets the driver back to the default settings. Default settings which you can alter more deeply in the Windows system to something most used and more reliable; like having the color management setting on Application Managed Colors which is not the manufacturer's default. On a Pro machine 8-(
After opening the driver menu to its default setting and creating a print page size in the driver, the warning about width is not really a problem, you can then set landscape or portrait as you wish. The numbers you mentioned should allow a landscape print on that roll width. The print margins on a roll are about 5mm so 10mm lost on the width which is less than half an inch. If that is not working it could be that Added Page Margin sizes are set in QU and you have to remove them. QU>Edit>Preferences>Page Margins.
In the driver I almost always create custom print page sizes that relate to roll width sizes minus 1mm and put that number at the front to find that size more easily. So 1117, 913, 609 and 430mm. Not all rolls are made equal on width. Followed by the number that represents the length on the roll, which can be less than the width so I get that warning often enough. Then I select landscape and it should be correct or I did not calculate well enough myself. Set Print Preview in the driver to prevent an embarrassment like that when the print is made.
I actually have 0" at the front of custom print page size names to get them in alphabetical order and in the top of QU's print page size settings but that is a relic of the time that the interaction between QU and the HP drivers was trustworthy.
Sometimes your image will not fit in the custom print page size while you are sure it should fit. Likely cause a stuck QU Border+ size that adds to the QU Print size or to the image Original Size you have chosen in QU. Or you did not allow a QU Auto Print Rotation of the image.
Met vriendelijke groet, Ernst Dinkla
https://www.pigment-print.com/spectralplots/spectrumviz_1.htm"For every complex problem there is an answer that is clear, simple, and wrong." H. L. Mencken