rman delete obsolete fail netbackup 7.0 for oracle

Hi

we are backing up an oracle database with netbackup and rman catalog.

After reading the netbackup doc for oracle. I am implementing the crosscheck needed and the delete expire and obsolete.

I have the following issues

1. with the delete obsolete which return the rman error RMAN-06214  for backupset and archivelog all;
2. I keep saying time to time "database reset to incarnation to" after issuing a command.
3. If I do a list expired I see in the list the backup done the night before ?

Hope someone can help.

regards

Pascal