rman查询问题，ORA-27191 occurred during call to DBMS_BACKUP_RESTORE.VALIDATEBACK

redliquid

问题描述：
ORACLE 817
之前是连接catalog备份的，现在因为环境问题不连接catalog备份了，同时catalog库，已经不存在了，也就是说之前的环境的完全没有了，现在备份没问题，但是我crosscheck，change backupset id delete，delete obsolete等等这些命令，都报如下错：

RMAN-03022: compiling command: XCHECK
crosscheck archivelog all;
RMAN-03023: executing command: XCHECK
RMAN-03026: error recovery releasing channel resources
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03006: non-retryable error occurred during execution of command: XCHECK
RMAN-07004: unhandled exception during command execution on channel delete
RMAN-10035: exception raised in RPC: ORA-27191: sbtinfo2 returned error
Additional information: 2
RMAN-10031: ORA-27191 occurred during call to DBMS_BACKUP_RESTORE.VALIDATEBACKUPPIECE


现在使用的备份软件是legato+nmo，之前使用的不详，因为环境已经不存在了。