>set oracle_sid=orcl >orapwd file=‘D:\app\Administrator\product\11.2.0\dbhome_1\database\PWDORCL.ora‘ password=ys1orcl entries=10 OPW-00001: Unable to open password-file
修改方法：
去掉引号
>orapwd file=D:\app\Administrator\product\11.2.0\dbhome_1\database\PWDORCL.ora password=ys1orcl entries=10
OPW-00001: Unable to open password-file
原文：http://www.cnblogs.com/abclife/p/4877153.html