ORA-01017 with RMAN

Hi, I've been dealing with this error since the oracle backups from tx DB13 have been scheduled with the option to verify with RMAN or DBVERIFY:

I've already followed the instructions in SAP Note 776505 - ORA-01017/ORA-01031 in BR*Tools on Linux and Solaris 11 but with the same outcome.  Could it be some missing authorisations with the OPS$ORA<SID> user??

Any help would be greatly appreciated.

Thanks & Regards,

Jesus Rodriguez