6 calls to form_error() in Drupal 6

aggregator_categorize_items_validate in modules/aggregator/aggregator.pages.inc

Validate aggregator_categorize_items form submissions.

date_validate in includes/form.inc

Validates the date type to stop dates like February 30, 2006.

filter_form_validate in modules/filter/filter.module

Validation callback for filter elements in a form.

install_configure_form_validate in ./install.php

Form API validate for the site configuration form.

password_confirm_validate in includes/form.inc

Validate password_confirm element.

_form_validate in includes/form.inc

Performs validation on form elements. First ensures required fields are completed, #maxlength is not exceeded, and selected options were in the list of options given to the user. Then calls user-defined validators.