OCI-17528
        A read-only file or a file opened read-only cannot be written to: string.
        
        
        Cause
        The file was read-only or was opened read-only and an attempt was made to write to the file, or there was an internal error.
        Action
        If the file is a parent of a snapshot, then you cannot open read/write, drop or unplug the database. Otherwise, look at the trace file and contact Oracle Support Services.
        
     
    
    
        OCI-17528
        A read-only file or a file opened read-only cannot be written to: string.
        
        
        Cause
        The file was read-only or was opened read-only and an attempt was made to write to the file, or there was an internal error.
        Action
        If the file is a parent of a snapshot, then you cannot open read/write, drop or unplug the database. Otherwise, look at the trace file and contact Oracle Support Services.
        
     
    
    
        OCI-17528
        A read-only file or a file opened read-only cannot be written to: string.
        
        
        Cause
        The file was read-only or was opened read-only and an attempt was made to write to the file, or there was an internal error.
        Action
        If the file is a parent of a snapshot, then you cannot open read/write, drop or unplug the database. Otherwise, look at the trace file and contact Oracle Support Services.