Running Civi 4.7.27 / Drupal 7.59

I have developped a rather complex Webform to enable the registration of several participants, with conditionals and associated Contributions, to an Event (I already have had several of this kind without any problem).

But with this one, when I complete the registration, I get an "Unexpected Error".

Then, if I come back to the form (via the browser back arrow), and re-register, everything runs OK.

Of course, I Can't put this webform in production without solving this : any help is welcome.

  • You got to see Civi, php and drupal log for more information. Its very difficult to provide an answer without having any clue about the error. Turning on Civi debugging might be helpful. Jun 18, 2018 at 10:17
  • Thank you Pradeep. I have turned Civi debugging on ; what next ? (I am not a programmer, thus not accustomed to this) Jun 18, 2018 at 12:41
  • Is there any suspicious thing in logs? Jun 18, 2018 at 13:17
  • Where can I read that ? Jun 18, 2018 at 14:18
  • For drupal - Drupal >> Reports >> Recent Logs. For CiviCRM- /files/civicrm/Confilog/CiviCRM.XXXX.log. php logs - /var/logs/apache2/error.log Jun 18, 2018 at 14:26

1 Answer 1


I think I found the cause : I forgot to fill the "Fee" tab of the Event Form.

Everything is running OK now

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.