The log stops before starting the parsing of the shelf content. Do you have by any chance any smart material or other content that may have been created with a more recent version?
@Justin Meisse: Just pointing out the online book Procedural Content Generation in Games and the Procedural Content Generation Wiki in case you (or anyone else that's interested) haven't already seen them.
You shouldn't ever need to do this. I'd make sure that there is a package with that name in the content folder. Look for the UPK in explorer to double check. Your packages must be saved in the content folder or a subdirectory of it.
Just to add to the thread here, Unreal Engine 4 has an asset store called Marketplace. It's not yet open to content creators' submissions, but being open to content creators is high among their priorities.