Are you sure you have specified the correct backup piece name ? Does this file "D:\ORACLE\BACKUP\1FNKFCVT_1_1" contain any extensions as ".bak", if so then specify it completely with the path.
RMAN-06172:no AUTOBACKUP found or specified handle is not valid copy or piece
Please consider closing your question by providing appropriate points once you feel that it has been answered.
RMAN>list backup of controlfile summary;
Shivananda Rao wrote:I have backup DB using this script:
Are you sure you have specified the correct backup piece name ?