ORA-19675: file string was modified during proxy copy
Cause: A proxy backup of the specified file failed because the file was brought on-line or otherwise modified while the proxy backup was in progress. This file was off-line or read-only when the backup began, so the file was not put into hot-backup mode, therefore no modifications are permitted while the backup is in progress.
Action: Take another backup of this file.
ORA-19675错误时指代在使用远程拷贝（Proxy Copy）时，文件已被修改，导致拷贝失败。
Oracle在此时会显示ORA-19675错误，并显示文件名。
ORA-19675 : proxy copy of file string was modified during copy
Cause: The file was modified during the copy command between the two hosts, either through a mis-Match of checksums or through other means such as a race condition.
Action: Ensure that the correct version of the file is intact before attempting copy operations again.
在执行RMAN备份时报此错：
RMAN-06085: proxy copy of file string was modified during copy
1、确定当前RMAN备份脚本是否正确；
2、检查目标路径是否可以访问；
3、检查存储空间是否充足；
4、检查目标磁盘扇区与源文件大小是否匹配；
5、确认当前RMAN备份脚本在操作源文件和目标文件的用户权限具备；
6、检查已备份的归档日志是否存在；
7、检查备份路径可读可写权限；
8、检查目标文件的权限是否正确。