Check if you have made any errors in the configuration, most common one is to add extra space before/after field names in list field configuration. 

Otherwise I don't think multiple levels of nesting are supported.

Hi Klas, 

all lists works separately or without third nested list, so i think its seems not to be supported or a bug. Extra spaces are also checked ;)

Is there a other solution or work around to get the view i need? 

I want to show first fields of the parent category, below fields of child categories each followed by fields of related articles.

You would need to add code to beforeRender and render those fields using JCckContent classes.

Can you give me a hint how to render fields related to a special cat_id via beforeRender and JCckContent classes? E.g. i am on list for child categories and want to display the category description and other fields of parent category. I have read some posts but found no solution for this. 

You gotta know mysql/php for this, first query for records in database then render them using Seblod. Basically you would need to do the same as your nested list that doesn't work.

Thank you, is there a documentation or example what i need to render for this issue or how use JCckContent classes?

A word of warning - tutorial was written before latest changes to JCckContent classes, not all information is up to date - now every storage object has it's own implementation of this class, some more info is available if you search the forum.

I dont want to record data, i want do get already recorded value of fields which are not related to actual list!? I can use simple sql statement but than i get the seblod tags inserted in description field to. I have searched on forum but did not get any helpfully example/infos. Maybe i should use module, but this is very uncomfortable and confusing.

Using JcckContent you can load records as well, not only store. There is also JCckDev class to help you render fields.