Custom model not working with 3.4c

[tank]

Hi,

i have several custom data models and all of them work well in alfresco 3.3
I wanted to update my alfresco installation to 3.4 but now it fails compiling my models with errors like:
"Cannot define association cm:contains as namespace http://www.alfresco.org/model/content/1.0 is not defined by model .."

Of course I have imported the namespaces. With 3.3 it works like a charm. Any ideas?

[_sax]

This is due to a strengthened validation of content models, applied as well to workflows.
See http://forums.alfresco.com/en/viewtopic.php?f=5&t=36680 for my quest for a correct model.