我在使用 TSPITR 恢复单个表空间时遇到问题。错误堆栈显示以下内容：
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 06/15/2017 20:09:35
RMAN-06962: Error received during export of metadata
RMAN-06960: EXPDP> ORA-31626: job does not exist
ORA-31637: cannot create job TSPITR_EXP_yhqe_Erry for user SYS
ORA-39062: error creating master process DM00
ORA-31613: Master process DM00 failed during startup.
我正在使用全自动 TSPITR 方法，当 rman 在完全恢复辅助数据库并创建数据泵目录后启动导出元数据时，它在级别上失败。请帮忙。