When my Drupal CiviCRM Webform is filled out and submitted, the CiviCRM database appears to be updated correctly. That is, a new contact is created with all the proper information included from the form. The Webform confirmation page announces: "Thank you, your submission has been received." However, a red error box also appears that says:

"Warning: implode(): Invalid arguments passed in CRM_Core_BAO_CustomGroup::postProcess() (line 1551 of /home/mywebsite/www/crm/sites/all/modules/civicrm/CRM/Core/BAO/CustomGroup.php)."

Any idea what this means and how to get rid of the error message?

Drupal 7, CiviCRM 5.14.1

1 Answer 1


That's just a notice -> best to hide all notices and errors on a production site:

go to your: admin/config/development/logging

and set the radio button to: None

  • Thanks much. That solved my problem. Jun 26, 2019 at 22:05
  • Excellent - glad that helped you out. Next time I’m in the section I’ll have a look and check why we have that notice (and fix it) but the answer still is you never want to show notices and errors to your website visitors. Jun 27, 2019 at 12:49

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