I have files that I can check out using the FrameMaker CMS from SharePoint 2013. But once they're checked out, I can neither save nor check them back in. In looking at the checkout file structure, it appears there are always 2 locations for checked out file, with one that "view only". The directories are actually, e.g., Files and Files_viewOnly, with the second containing files that are all read only. This has existed in previous version of FrameMaker, but we never had this problem with FrameMaker 11 and earlier versions of SharePoint.
It's like it's only looking at the "viewOnly" version even though I just checked the files out.