i have a question regarding the ARCHIVE LOGS.

After starting the backup with HP Data Protector we get this Message.
The File ARC19788.001 is not present in the system anymore, i think somebody has deleted the file.
The oldest ARCHIVE Log is "ARC22170.001"

Is ist possible to reset the counter?

RMAN-03090: Starting backup at 11-MAR-14
RMAN-03033: current log archived
RMAN-08031: released channel: dev_0
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 03/11/2014 20:16:36
RMAN-06059: expected archived log not found, lost of archived log compromises recoverability
ORA-19625: error identifying file F:\DBMS_LOG\IASP\ARCHIVE\ARC19788.001
If you need more Information please be so kind ans tell me the commands which i should type in.

Thanks a lot