RMAN: validation failed for archived log

 Hello there. Need some of your expierence about a little issue with RMAN!!!!
We are getting this messages:

---

archive log filename=/archi/spr2/2_3549.arc recid=7399 stamp=669897634
validation failed for archived log
archive log filename=/archi/spr2/2_3550.arc recid=7400 stamp=669902451
validation failed for archived log
...
---

These archives are deleted from filesystem, in fact only validate the real archives:
-
validation failed for archived log
archive log filename=/archi/spr2/2_7936.arc recid=15800 stamp=692668780
validation succeeded for archived log
archive log filename=/archi/spr2/2_8214.arc recid=16257 stamp=694814412
validation succeeded for archived log
archive log filename=/archi/spr2/2_8215.arc recid=16259 stamp=694836072
validation succeeded for archived log