Hi, I found that for some reasons, some of my music files were not imported into the Roon library. They were imported in Audirvana. I am using iMac with music files stored on the same machine. Running latest OSX High Sierra 10.13.2 and latest version of Roon Version 1.4 (Build 294) stable (64 bit). Many diff files were “Audio Stream Format Not Supported” whilst others were successfully imported into the Roon Library. There are other files which have failed to import for “I/O Failure”.