Thread:Project:Support desk/Need help with blank table rows in templates

I am beginner in mediawiki. I need help with the following :

I want to create a template. I want to hide in the template blank table rows.

I put this Code in my template: Only the field "Feld5"

But i get an error.

Sorry, i cant post a link..... :-(

jackweb.me/img/wiki02.jpg

What am I doing wrong. Or do I have to install any extensions ?

I use the following:

System: MediaWiki 	1.24.2, PHP 	5.4.39-0+deb7u1 (cgi-fcgi), MySQL 	5.5.41-0+wheezy1

Extensions: Interwiki, Cite, ImageMap, InputBox, Title Blacklist, WikiEditor

Thank you for your help