previous and next images throwing fatal errors

[propertunist]

for many months i have seen white screen errors for some, not all, of the images on my site.
i just investigated and the errors relate to the searching for previous and next images.

Call to a member function getURL() on a non-object in /mod/tidypics/views/default/object/image/navigation.php

i haven't found the cause. i can stop the white screening by adding logic to the navigation page to check that the $previous_photo and $next_photo variables have been set before attempting to render the arrow icons in the page.. however, this means there are no arrows for some images.
any advice welcome here, i don't want to delete and reupload the images.

elgg 1.8 - 1.8.13
nginx
php 5.4
tidypics 1.8.0 rc1

[Herauf]

I have the same issue (or similar) My problem is caused by uploads failing due to pictures exceeding max_upload_size. The entity is created, but no picture uploaded. When displaying the next/prev arraws points to non existing entities.

I havn't found the correct fix for the problem. My work around is not to make the arrows links.