@magmazing – Sorry to read you have been having this issue for months on end, have you submitted a Bug Report (http://www.nextgen-gallery.com/report-bug/) recently on this issue?
– Cais.
So I did a fresh install of the latest version of NextGen Gallery in a test WordPress install and saw that I was having the same issue with thumbnails not generating.
I’m getting this error: Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 7108 bytes) in /home/xxxxxxxx/public_html/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_data/class.ngglegacy_thumbnail.php on line 568
(xxxxxxxx substituted to represent my hosting account username)
All the photos I upload have been 2000 X 1333 or 1333 X 2000 pixels since I started using NextGen Gallery years ago. Those sizes generate thumbnails in version 1.9.13, but don’t ever since the 2.0 upgrades
I tried out lower resolution versions and 1500 X 1000 pixel and smaller jpgs seem to generate thumbnails fine in the 2.0.58
@magmazing You can increase your PHP memory limit as described here, or asking to your web service provider.
As for the image dimensions, 800/900px on the longest side most of the time is the ideal measure.
@tizz My 2000 pixel photos generate thumbnails perfectly fine in version 1.9.13, so I don’t see how it can be a web service provider issue unless the way thumbnails are generated drastically changed in 2.0?
I have tried adding define define( ‘WP_MEMORY_LIMIT’, ’96M’ ); (and higher) into the wp-config.php and it did nothing.
Also in my version 1.9.13 install on my live site it states right on the upload page “Based on your server memory limit you should not upload larger images then 2272 x 1704 pixel”
@magmazing – The memory limit @tizz is referring to would be set typically in a php.ini file rather than via the wp-config.php file as WordPress should pick up on the php.ini value and use it accordingly.
– Cais.