Custom Fields
Support Meta Box Builder Fatal error: Allowed memory size of # bytes exhausted

  • Creator
  • #16937

    When trying to edit a custom Field Group I get the following error:

    Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 4198400 bytes) in hidden/wp-includes/functions.php on line 3737
    There has been a critical error on your website. Please check your site admin email inbox for instructions.
    Learn more about debugging in WordPress.

    Do you have any idea what could be the issue? I can still edit Post Types.

    MB Custom Post Type - Version 1.9.1
    Meta Box - Version 5.2.3
    Meta Box AIO Version - 1.10.7
    Meta Box for Yoast Seo - Version 1.3.5

Viewing 10 replies - 1 through 10 (of 16 total)
  • Author
  • #16986
    Anh Tran

    How many posts/terms do you have on the website?


    wp_posts has 170889 rows
    wp_terms has 6167 rows


    Any ideas on this? We can't edit our custom fields until this is resolved and have changes to make.

    Anh Tran

    Hi, I've just pushed a new version of Meta Box Builder, which has a fix for this issue. Please update.


    After the latest update, also on a site with thousands of posts & taxonomies, editing or creating any field group in MB Builder is causing my browser to stall/crash


    I just updated. I now have different issues. My browser does not stall/crash like pza's, but when the Edit Field Group page loads:

    • my custom fields are not loaded (see screenshot)
    • the side menu of field types is styled incorrectly (see screenshot)
    • clicking on the "Settings" tab does nothing (does add a # to the url)
    • clicking on the "Code" tab works but the resulting page does not reflect my custom group's data


    Anh Tran

    Hi Purdue, can you enable debug and see if there's any error?


    I enabled debug mode in wp-config.php, reloaded the page, and did not receive any errors.

    Anh Tran

    So strange. Do you see any JS error in the console?


    So I'm still assuming this is related to this topic (sorry if not) but I found the conflict in my case.

    • First I tried disabling all plugins except MB & MB AIO. I also tried changing to 2020 theme. My problem persisted: "Edit field group" window completely freezes and uses up 100% of CPU. No errors in the logs.

    With WP Debug on, I see only this warning

    Notice: Undefined index: taxonomy in /wp-content/plugins/meta-box-aio/vendor/meta-box/mb-custom-post-type/inc/taxonomy/register.php on line 113

    But this warning shows with MB AIO 1.10.7 as well, which does not freeze up.

    Next I started disabling AIO Extensions 1 by 1. The one that fixed it was disabling "Meta Box Include Exclude". Then my "edit field group" loaded fine. It didnt matter which field group I'm editing (whether it's using include/exclude or not).

    I'm just happy I know how to avoid it, as it was locking up my whole site. I hope this can help!

Viewing 10 replies - 1 through 10 (of 16 total)
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