Hi,
%ORA-19625: error identifying file /oracle/SID/sapbackup/belokcak.spa/sr3.data25
ORA-27041: unable to open file
IBM AIX RISC System/6000 Error: 22: Invalid argument%
You getting above error. "Error:22:Ivvalid argument " . This error comes usully due to operating system issue. Please have a look on below OSS note . May be this is a temp issue due to OS. What about the status of next run of backup. Please have a look on below OSS note.
Note 546006 - Problems with Oracle due to operating system errors
Reagrds
Ram