Incremental backup not able to read full backup. ORA-19870 error reading backup piece...

I set up my databases to do a full backup once per week to be used toward incremental daily backups (Oracle suggested) accordingly.  for some reason in one of my databases, it looks like the incremental backup cannot read one of the files created from the full backup.  Below is the log:

Recovery Manager: Release 10.2.0.3.0 - Production on Tue May 19 16:04:21 2009



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RMAN>

connected to target database: ODBTEST (DBID=3912159521)



RMAN>

connected to recovery catalog database



RMAN>

echo set on





RMAN> run {

2> allocate channel oem_disk_backup device type disk;

3> recover copy of database with tag 'ORA$OEM_LEVEL_0';