Title: Version 5.6 generating multiple errors Last modified: August 20, 2016 --- # Version 5.6 generating multiple errors * [Mary B.](https://wordpress.org/support/users/mary-b/) * (@mary-b) * [15 years ago](https://wordpress.org/support/topic/version-56-generating-multiple-errors/) * I got the following error messages a few minutes ago when I installed SEO Ultimate ver. 5.6. Yes, I disabled all the other installed plugins, then reactivated SEO Ultimate, with the same result: * The plugin generated 350 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin. * Notice: Undefined index: cron in /home/******/public_html/wp-content/plugins/ seo-ultimate/plugin/class.seo-ultimate.php on line 1512 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1981 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1981 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1982 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1981 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1982 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1981 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1982 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1981 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1982 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1981 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1982 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1981 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1982 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1981 * Notice: Undefined index: page in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 1982 * Notice: rss.php is deprecated since version 3.0! Use wp-includes/class-simplepie. php instead. in /home/******/public_html/wp-includes/functions.php on line 3343 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: issued in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/sds-blog/sds-blog.php on line 86 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: Trying to get property of non-object in /home/******/public_html/wp-content/ plugins/seo-ultimate/modules/more-links/more-links.php on line 58 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/includes/jlwp/functions.php on line 13 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 * Notice: Undefined index: post in /home/******/public_html/wp-content/plugins/ seo-ultimate/modules/class.su-module.php on line 2130 * Notice: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in /home/******/public_html/wp-includes/functions.php on line 3303 Viewing 3 replies - 1 through 3 (of 3 total) * Plugin Contributor [John](https://wordpress.org/support/users/johnlamansky/) * (@johnlamansky) * [15 years ago](https://wordpress.org/support/topic/version-56-generating-multiple-errors/#post-2103009) * It looks like WP_DEBUG mode is enabled on your site. Look in your wp-config.php file for a line that looks like this and remove it: * `define('WP_DEBUG', true);` * In a future version I’ll fix these errors so they don’t appear even when WP_DEBUG is turned on. * Thread Starter [Mary B.](https://wordpress.org/support/users/mary-b/) * (@mary-b) * [15 years ago](https://wordpress.org/support/topic/version-56-generating-multiple-errors/#post-2103012) * Yes, I turned on WP_DEBUG on purpose. I **want** to see if plugins, themes, etc. that I install will generate errors. * Plugin Contributor [John](https://wordpress.org/support/users/johnlamansky/) * (@johnlamansky) * [15 years ago](https://wordpress.org/support/topic/version-56-generating-multiple-errors/#post-2103095) * Version 5.6.1 should fix most of these. Viewing 3 replies - 1 through 3 (of 3 total) The topic ‘Version 5.6 generating multiple errors’ is closed to new replies. * ![](https://ps.w.org/seo-ultimate/assets/icon.svg?rev=1147635) * [SEO Ultimate](https://wordpress.org/plugins/seo-ultimate/) * [Frequently Asked Questions](https://wordpress.org/plugins/seo-ultimate/#faq) * [Support Threads](https://wordpress.org/support/plugin/seo-ultimate/) * [Active Topics](https://wordpress.org/support/plugin/seo-ultimate/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/seo-ultimate/unresolved/) * [Reviews](https://wordpress.org/support/plugin/seo-ultimate/reviews/) * 3 replies * 2 participants * Last reply from: [John](https://wordpress.org/support/users/johnlamansky/) * Last activity: [15 years ago](https://wordpress.org/support/topic/version-56-generating-multiple-errors/#post-2103095) * Status: not resolved