RMAN-06169: could not read file header for datafile string error reason string 

Cause: The specified datafile could not be accessed. The reason codes are: 

 1 - file name is missing in the control file 

 2 - file is offline 

 3 - file is not verified 

 4 - DBWR could not find the file 

 5 - unable to open file 

 6 - I/O error during read 

 7 - file header is corrupt 

 8 - file is not a datafile 

 9 - file does not belong to this database 

 10 - file number is incorrect 

 12 - wrong file version 

 15 - control file is not current 

Action: If the error can be corrected, do so and retry the operation. The SKIP option can be used to ignore this error during a backup. 

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