Hi Nicolas,
Indeed, C-c C-c solved the problem. Perfect! Thank you for your help.
CK


      From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
 To: Christian Prothmann <ckprothmann@yahoo.com> 
Cc: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>
 Sent: Saturday, September 3, 2016 4:45 AM
 Subject: Re: Org-Mode: Property inheritance for new files in column view agenda doesn't work
   
Hello,

Christian Prothmann <ckprothmann@yahoo.com> writes:

> File (#+PROPERTY:) or parent (:PROPERTIES:) inherited properties of
> newly created files are not picked up in agenda column view agenda,
> despite property inheritance enabled. Emacs/Org restart is required to
> make these inherited properties visible in column view agenda. Any
> ideas?

Did you use C-c C-c on #+PROPERTY. Could you provide an ECM?

Regards,

-- 
Nicolas Goaziou