(Quelle: sakinshrestha.com)

Alex Rabe developed wonderful photo plugin for WordPress that is NExtGEN Gallery plugin. I recommend this plugin as the best for making photo gallery.

1 ) If you have problem in Thumbnail Generation and Receive error like:
Follow thumbnails could not created.
DSC00422.JPG (Error : Exceed Memory limit. Require : 57 MByte)
DSC00423.JPG (Error : Exceed Memory limit. Require : 57.01 MByte)
DSC00424.JPG (Error : Exceed Memory limit. Require : 57.01 MByte)
DSC00425.JPG (Error : Exceed Memory limit. Require : 57.01 MByte)

For Older Version:
You just edit the file “thumbnail.inc.php” which is located at: /wp-content/plugins/nextgen-gallery/lib/thumbnail.inc.php

Search for

[php]// @ini_set(‘memory_limit’, ’128M’);[/php]

Change it to

[php]ini_set(‘memory_limit’, ’128M’);[/php]

Now you are done, just save and upload the file.

For New Version:
You will not find the file “thumbnail.inc.php” instead you will find the file “gd.thumbnail.inc.php” which is located in the same location “/wp-content/plugins/nextgen-gallery/lib/thumbnail.inc.php” . You just need to edit this file.

Search for

[php]// @ini_set(‘memory_limit’, ’128M’);[/php]

Change it to

[php]@ini_set(‘memory_limit’, ’128M’);[/php]

Now you are done, just save and upload the file.