Qimage can handle single frames up to 1.5 to 2.0 GB so keep each panel in that range.  A 52 x 65 inch print at 720 PPI is 5 GB so it's probably best to split that into 2x2 (4) panels and let Qimage print those side-by-side.  As long as you are within the single photo limit of say 1.5 GB pixel size and your printer is printing in raw spooling mode, there should be no issue.

BTW I assume you have enough pixels in your original image for it to be 720 PPI at 52 x 65 inches?  In other words, is the original image you are printing 37,440 x 46,800 pixels?  The biggest mistake I see is that people often make an image too large in Photoshop and then feed it to Qimage: they'll take a 24 megapixel photo from a single camera image and upsample it to 5 gigabytes in Photoshop, save it, and then try to print it.  This is backwards and you'll lose quality!  Give Qimage the original 24 MP image and let it do the upsampling at print time.  And if you are stitching a bunch of panels together in Photoshop, don't do it in Photoshop if you already have the panels prepared and edited: lay out the panels on the page in compact placement in Qimage: Qimage will "stitch" them at print time.  That way you aren't creating massive photos and upsampling at the wrong stage in the process.

Regards,
Mike

The Epson 11880 printer aborted the printjob of 8 segments butted together to make a continuous image (each around 760mb 41859 pixels wide 6428 high).  Banner Roll was not selected. Does the Banner Roll option help prevent the driver from getting overloaded? Qimage is set to 720ppi - in my case; a  required setting. Thanks.

The print stops part way without a message - paper ejects. There's an inch high block mid way across the span of the image. I thought this would have to do with memory.
Your advice is to choose Banner Roll and to NOT specify any length to the image, correct?

thank-you