Make sure you have all the dimensions set in your ImageGalleryPage Configuration tab.

I've had this problem, shouldn't this be validated on the form either frontend or backend to make it impossible for people to make mistakes. Lots of silverstripe projects customers have access to CMS so it is definitely a risk that they change the form and then it corrupts on the frontend of the site without them realising what they have done. I thought that I could just set one setting for the thumbnail and the other side would be worked out depeding on what the ratio of the photo size was.

This should ideally be set as standard, validation so that either neither height or width is set or that both are set.

Otherwise really great module and really impressed by what you have accomplished.

Cheers

Will

Hi UncleCheese,
I am getting this strange error for Image:

[Warning] imagejpeg() [function.imagejpeg]: Unable to open '../assets/Uploads/_resampled/CMSThumbnail-Building-HP-4.jpg' for writing
GET /images/iframe/HomepageSliderSlide/113/Photo

Line 397 in /var/www/vhosts/friendsofpubliced.org/httpdocs/sapphire/filesystem/GD.php
Source

388             case "gif": $type = 1; break;
389             case "jpeg": case "jpg": case "jpe": $type = 2; break;
390             default: $type = 3; break;
391          }
392          
393          // if the extension does not exist, the file will not be created!
394          
395          switch($type) {
396             case 1: imagegif($this->gd, $filename); break;
397             case 2: imagejpeg($this->gd, $filename, $this->quality); break;

Can you give me suggesstion how this error is rectified.
I increased the memory size to 128MB using this code "ini_set('memory_limit', '128M');" in mysite/_config.php file.
But It is not giving the solution for this error.

I am not getting this error in my localhost with the same server copy. This error is coming in Production server only.

It is coming in ImageGallery module, for "cover Image " under Albums tab.
This same error also coming in another Page used for Homepage slide shows .
class HomepageSlider extends Page {
   static $defaults = array(
      'HideInSitemap' => '1',
      'ShowInMenus' =>'0',
   );
   
   static $allowed_children = array(
      'HomepageSliderSlide'
   );

and

class HomepageSliderSlide extends Page {
   static $defaults = array(
      'HideInSitemap' => '1',
      'ShowInMenus' =>'0',
   );
   
   static $db = array();
   
   static $has_one = array(
      'Photo' => 'Image'
   );