Title: Cannot use output buffering Last modified: October 5, 2017 --- # Cannot use output buffering * Resolved [Lab Lover](https://wordpress.org/support/users/peterscaffidi/) * (@peterscaffidi) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/) * I have recently started seeing this in my php error log. Can you give me any insight as to what it means and how I might resolve it? * PHP Fatal error: ob_start(): Cannot use output buffering in output buffering display handlers in /wp-content/plugins/mailchimp-for-wp/includes/integrations/ class-integration.php on line 248 * Thank you. * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcannot-use-output-buffering%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 8 replies - 1 through 8 (of 8 total) * [iza](https://wordpress.org/support/users/izap/) * (@izap) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9560351) - This reply was modified 8 years, 6 months ago by [iza](https://wordpress.org/support/users/izap/). - This reply was modified 8 years, 6 months ago by [iza](https://wordpress.org/support/users/izap/). - This reply was modified 8 years, 6 months ago by [iza](https://wordpress.org/support/users/izap/). * Plugin Contributor [Lap](https://wordpress.org/support/users/lapzor/) * (@lapzor) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9561111) * Hi, * Could it be that your server is short on memory? * This error might be caused by PHP settings (output handler or zlib compression). If this is indeed the case you can ask your hosting provider for help on that. * I’ve reported this issue to our developer as well, he might need a couple of days to look into this for you. * Thanks for letting us know. * Plugin Author [Danny van Kooten](https://wordpress.org/support/users/dvankooten/) * (@dvankooten) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9561379) * Hi Lab Lover, * The error indicates that your server is running an “output handler” that is incompatible with a technique used in our plugin, and used widely by many WordPress plugins. Are you running a plugin like W3 Total Cache by any chance? If so, could you try temporarily disabling that to see if the error persists? * Thanks in advance! * Thread Starter [Lab Lover](https://wordpress.org/support/users/peterscaffidi/) * (@peterscaffidi) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9564010) * Danny and Lap, thanks for replying. I have had my host increase the amount of memory available for scripts from 128 to 256. I have adjusted the wp-config file to avail the site of the increased memory. I cannot yet say if that solved the problem. * As for a caching plugin, I am not running one nor am I using the built-in WordPress caching function. Below is a list of the active plugins on the site, are there any which you think might be causing a conflict? Thanks for your assistance. Oh, the website is bpdglobal.com * Akismet Anti-Spam by Automattic. All-in-One Event Calendar by Time.ly by Time. ly Network Inc.. All-in-One Event Calendar Extended Views by Time.ly by Time. ly Network Inc.. Amazon Associates Link Builder by Amazon Associates Program. Anti-Malware Security and Brute-Force Firewall by Eli Scheetz. AutoChimp by Wanderer LLC Dev Team. Contact Form 7 by Takayuki Miyoshi. Contact Form 7 Honeypot by Nocean. Content Mirror by Klas Ehnemark. Delightful Downloads by Ashley Rich. Disable Comments by Samir Shah. Duplicate Post by Enrico Battocchi. Error Log Monitor by Janis Elsts. Favicon by RealFaviconGenerator by Philippe Bernard. Flexible Posts Widget by DPE WS&D LLC. GeoIP Detection by Yellow Tree (Benjamin Pick). Google Analytics Dashboard for WP (GADWP) by Alin Marcu. Google XML Sitemaps by Arne Brachhold. iframe by webvitaly. iQ Block Country by Pascal. iThemes Security by iThemes. Link Library by Yannick Lefebvre. MailChimp for WordPress by ibericode. NextScripts: Social Networks Auto-Poster by NextScripts. Page Links To by Mark Jaquith. PayPal Donations by Tips and Tricks HQ, Johan Steen. Plugins List by David Artiss. Postman SMTP by Jason Hendriks. RDP Wiki Embed by Robert D Payne. Send From by Benjamin Buddle. Simple Custom Post Order by Colorlib. Soundcloud is Gold by Thomas Michalak. Suffusion Shortcodes by Sayontan Sinha. Tabby Responsive Tabs by cubecolour. Testimonials Widget by Axelerant. TinyMCE Advanced by Andrew Ozz. Uber Login Logo by UberWeb. Wordfence Security by Wordfence. * Plugin Contributor [Lap](https://wordpress.org/support/users/lapzor/) * (@lapzor) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9564624) * Did you already ask your hosting provider for support on this? Could you ask them if they are using Apache something else as hosting software? * Thanks! * Thread Starter [Lab Lover](https://wordpress.org/support/users/peterscaffidi/) * (@peterscaffidi) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9565487) * Thanks, but going to a hosting company for assistance with this kind of problem is akin to asking my wife to help me find a date for Friday night. * It appears the problem is a conflict with another plugin, I will wait another day before I draw that conclusion and ask Danny to take a look at the issue. Hopefully, it will not turn into a case of one plugin author pointing a finger at the author of another plugin. * Plugin Contributor [Lap](https://wordpress.org/support/users/lapzor/) * (@lapzor) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9566421) * If it’s a compatibility issue with another plugin you can try switching all plugins off and then turning them on 1 by 1 until the issue reappears so at least we know between what two plugins the issue comes up. * Thanks! * Plugin Contributor [Lap](https://wordpress.org/support/users/lapzor/) * (@lapzor) * [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9586265) * Since there have been no replies for awhile I will now mark this ticket as “resolved”. If you are still experiencing this issue or you have a similar problem, please create a NEW ticket. * Thank you! Viewing 8 replies - 1 through 8 (of 8 total) The topic ‘Cannot use output buffering’ is closed to new replies. * ![](https://ps.w.org/mailchimp-for-wp/assets/icon-256x256.png?rev=1224577) * [MC4WP: Mailchimp for WordPress](https://wordpress.org/plugins/mailchimp-for-wp/) * [Frequently Asked Questions](https://wordpress.org/plugins/mailchimp-for-wp/#faq) * [Support Threads](https://wordpress.org/support/plugin/mailchimp-for-wp/) * [Active Topics](https://wordpress.org/support/plugin/mailchimp-for-wp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/mailchimp-for-wp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/mailchimp-for-wp/reviews/) ## Tags * [buffering](https://wordpress.org/support/topic-tag/buffering/) * [PHP errors](https://wordpress.org/support/topic-tag/php-errors/) * 8 replies * 4 participants * Last reply from: [Lap](https://wordpress.org/support/users/lapzor/) * Last activity: [8 years, 6 months ago](https://wordpress.org/support/topic/cannot-use-output-buffering/#post-9586265) * Status: resolved