This is a fundamental limitation of the jpeg file format. A jpeg file is limited to images with width and height smaller than 65500. So this can't be fixed by Hugin.
There are 2 possibilities: a) select another output format: TIFF or PNG support also such big images (on the stitch tab) or b) decrease the canvas size (on the stitch tab) so the final pano has width<65500. The next version (2015.2 or 2016.0) will issue a warning in this case and propose the 2 case as above. ** Changed in: hugin Status: New => Fix Committed -- You received this bug notification because you are a member of Hugin Bug Hunters, which is subscribed to Hugin. https://bugs.launchpad.net/bugs/1462112 Title: 'Calculate optimal size' can suggest a size larger than the maximum width (65500) Status in Hugin - Panorama Tools GUI: Fix Committed Bug description: I have a 26-image panorama, and got stuck for a while with it failing on this simple point. Calculate optimal size suggests a canvas width of 70863, but Hugin cannot produce a jpeg wider than 65500. To manage notifications about this bug go to: https://bugs.launchpad.net/hugin/+bug/1462112/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~hugin-bug-hunters Post to : hugin-bug-hunters@lists.launchpad.net Unsubscribe : https://launchpad.net/~hugin-bug-hunters More help : https://help.launchpad.net/ListHelp