Error_platform_failure

Hi all,

So one minute my Gallery2 was working fine and the next it crashed. The error given shown below:

Error
Error (ERROR_PLATFORM_FAILURE)

    * in modules/core/classes/GalleryTemplate.class at line 288 (GalleryCoreApi::error)
    * in modules/core/classes/GalleryTemplate.class at line 214 (GalleryTemplate::_initCompiledTemplateDir)
    * in modules/core/classes/GalleryTheme.class at line 1025 (GalleryTemplate::fetch)
    * in modules/core/classes/GalleryView.class at line 301 (GalleryTheme::loadTemplate)
    * in main.php at line 465 (GalleryView::doLoadTemplate)
    * in main.php at line 104
    * in modules/core/classes/GalleryEmbed.class at line 189
    * in /export/web/csr/modules/gallery/gallery_base.inc at line 205 (GalleryEmbed::handleRequest)
    * in /export/web/csr/modules/gallery/gallery.module at line 452
    * in ??? at line 0
    * in /export/web/csr/includes/menu.inc at line 348
    * in /export/web/csr/index.php at line 18

So I go to look at GalleryTemplate.class and around line 288 I find this:

 if (!$platform->is_writeable($dir)) {
        return array(GalleryCoreApi::error(ERROR_PLATFORM_FAILURE), null);
        }

So I'm thinking something has gone wrong with the permissions but I'm not clear on the variables $platform (would that be the root folder of gallery2) or $dir. Any idea which folder permissions I should be investigating? I've checked my g2data and it's already on 777.

Thanks for that it worked. So this folder and its subfolders are always on 777? Is there any security risk to that