1. A signal recording and regenerating apparatus provided with a signal recording and regenerating converter and a signal recording medium, comprising: means for sequentially executing a plurality of error recovery processings recorded in an error recovery processing routine when a signal read error occurs; means for determining an execution sequence of said error recovery processings by structuring chains of addresses for calling; and means for changing the execution sequence of said error recovery processings by changing said chain; wherein said changing said chain is executed by changing weighting for each structure.