A read processing method and a reproduction system for continuously reading out an audio/visual data from a storage medium. When a data cannot be read out from storage medium, a data having a predetermined pattern is transferred so as to prevent operational deadlock caused by an error data even when the audio/visual data is transferred continuously. This method enables to allow to transfer audio/visual data continuously. Also, an application for reproducing data enables to identify an error, enabling to avoid the application falling into a non-executable condition or the system falling into a hung-up condition. In addition, because whether a retry is needed is determined when error data is transferred, it becomes possible to avoid an unnecessary retry in reproducing audio/visual or the like.