@Thomas: I agree the cause of the warning should be fixed upstream. I am not sure if the bug is in their tracker at https://redmine.darktable.org/projects/darktable/issues?page=2&query_id=1 and I am also not yet registered there.
@Stefan: I downsized the images on request by Thomas in comment #1. Before posting them, I tested/reproduced the bug. It is possible that my memory betrayed me and that the warnings I have seen on the two resized images set are not the same as the warnings that I have seen on the six full size images. If you want two full size images, I can try to find a place where to upload a 60MB zip file. However, I do not think it will make a difference: both sets of images were created by Darktable directly and the relevant metadata are identical. Thomas has identified the issue. Why the warning appears on my *X*ubntu 16.04 (which is the result of an upgrade from 14.04 that goes back to an upgrade from 12.04, is a mystery. When I have time I will try on a fresh install of *X*ubuntu 16.04 and report back, although at this point I think this bug can be left as a FYI if somebody finds the same behaviour. A best use of feedback-time is to feed this bug back upstream to Darktable. Maybe next weekend, no time now and the workload for the week is heavy. -- You received this bug notification because you are a member of Hugin Developers, which is subscribed to Hugin. https://bugs.launchpad.net/bugs/1635992 Title: Null count for "Tag 50341" (type 7, writecount -3, passcount 1) (in module "_TIFFVsetField") Status in Hugin: New Bug description: Hugin 2016.2.0.be8da0221960 from PPA on Xubuntu 16.04 Trying to stitch a couple of TIFFs created with Darktable The following error keeps popping up: Null count for "Tag 50341" (type 7, writecount -3, passcount 1) (in module "_TIFFVsetField") Hugin does its work, but clicking away the multiple error message (for each image, and it seems to come up every time the image is displayed) is a painful papercut To manage notifications about this bug go to: https://bugs.launchpad.net/hugin/+bug/1635992/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~hugin-devs Post to : [email protected] Unsubscribe : https://launchpad.net/~hugin-devs More help : https://help.launchpad.net/ListHelp

