Does SharePoint Collector generate an audit trail/error log listing any documents that could not be extracted for any reason? i.e.: locks, permissions, file size, etc.

Any errors that occur when itemizing the site, that is to say getting the collection of containers that can contain data, are contain in a itemization log, ItemizationtLog0.txt located in the Jobs folder of the target along with the export log ExportLog0.txt, an log that only contains export errors, ExportExceptionLog.txt, the chain of custody, ChainOfCustody.txt and a cross reference that will allow matching the user defined name of the list or library to the actual name in the SharePoint repository.