I get this error in Eclipse:
The OakConstraint would seem perhaps to indicate a violation of DAM Metadata Schema.
So while investigating I noticed PNG is not listed in /etc/dam/metadataeditor/mimetypemappings.
Does something need to be added in order to remove the Oak constraint violation?
Can you post a screenshot of the properties of the node /content/dam/pcwr/sprint-8-demo/top-nav-logo.png/jcr:content/renditions/cq5dam.thumbnail.140.100.png/jcr:content ?
That structure doesn't look right. How did you create that asset? It should have been dam:Asset > dam:AssetContent > nt:folder > nt:file
It was created automatically behind the scenes by AEM, probably the OOTB workflow that runs after an image is uploaded through the DAM UI. It's possible the node became corrupted as a result of this other issue: Re: Eclipse "Import from Server..." function corrupts the JCR
Is there a quick way to re-run the image upload workflows or somehow reset/overwrite these bad nodes?