ORA-13920
        Threshold cannot be set when database is in read-only mode.
        
        
        Cause
        SET_THRESHOLD procedure was called when database was open in read-only mode.
        Action
        Call SET_THRESHOLD procedure when database is open in read/write mode.
        
     
    
    
        ORA-13920
        Threshold cannot be set when database is in read-only mode.
        
        
        Cause
        SET_THRESHOLD procedure was called when database was open in read-only mode.
        Action
        Call SET_THRESHOLD procedure when database is open in read/write mode.
        
     
    
    
        ORA-13920
        Threshold cannot be set when database is in read-only mode.
        
        
        Cause
        SET_THRESHOLD procedure was called when database was open in read-only mode.
        Action
        Call SET_THRESHOLD procedure when database is open in read/write mode.