ORA-19866
        error writing file header for data file string
        
        
        Cause
        During a block recovery, the header of the data file could not be updated.
        Action
        Check the trace file for more information and contact Oracle Support.
        
     
    
    
        ORA-19866
        error writing file header for datafile string
        
        
        Cause
        During a block recovery, the header of the datafile could not be updated.
        Action
        Contact Oracle Support Services.
        
     
    
    
        ORA-19866
        error writing file header for datafile string
        
        
        Cause
        During a block recovery, the header of the datafile could not be updated.
        Action
        Contact Oracle Support Services.