Thanks. Have you taken any steps to verify the existence of your files at runtime, e.g. https://developer.apple.com/reference/foundation/filemanager/1410277-fileexists ? Getting that error means that a fileExists: check has failed for OpenEars, so I think the best line of investigation for you is whether the steps taken to make your lm available at runtime were successful. Sometimes this can be as simple as the path just being off by one directory level or something being added to an app target but not a test target or vice versa. This could also maybe be related to permissions for the file, but that seems less likely, so I would thoroughly investigate the easy stuff first.