[SOLVED][Drupal Webform] Undefined index: webform_client_form_XXX in drupal_retrieve_form()

| | 1 min read

A lot of Drupal users were encountering "Undefined index: webform_client_form_112 in drupal_retrieve_form() (line 738 of /****/html/includes/form.inc)" on their Drupal site and the Webform module remained hidden until the cache was cleared. If you are facing the same issue with Drupal Webform in your Drupal site then read on to find out the solution.

Although the cause has not yet be determined it would likely be a conflict with another module in your site. Here is the workaround used by a Drupal user

  • Create a custom module
  • Use the function - drupal_flush_all_caches() within that module
  • Set it to be executed at each cron run

Hope that helps.

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Reference: http://drupal.org/node/1300848