[Neos] ./flow node:autocreatechildnodes does not create child nodes

[Daniel Völkel]

Hi guys,

I'm almost done with my first Neos project. Now I wanted to create a new child node, but unfortunately Neos keeps telling me:
Node structure for workspace "live" already up to date

I have use the following command:
/flow node:autocreatechildnodes --node-type TYPO3.Neos.NodeTypes:Page

with this NodeTypes.yaml:
'TYPO3.Neos.NodeTypes:Page':
  childNodes:
    'slideshow':
      type: 'TYPO3.Neos:ContentCollection'
    'teaser':
      type: 'TYPO3.Neos:ContentCollection'

In the browser, the following error occurs:
Exception while rendering
landingPage<TYPO3.Neos:Page>/
body<TYPO3.TypoScript:Template>/
content/
slideshow/
__meta/
process/
contentElementWrapping:
The "node" property did not resolve to a NodeInterface, NULL given (2014110514322346333c)


Do you have idea how I could get Neos to build the missing nodes?

Best regards,
Dan