TNS-00515
        Connect failed because target host or object does not exist
        
        
        Cause
        The address specified is not valid, or the program being connected to does not exist.
        Action
        Ensure the ADDRESS parameters have been entered correctly; the most likely incorrect parameter is the node name.  Ensure that the executable for the server exists (perhaps "oracle" is missing.)
        
     
    
    
        TNS-00515
        Connect failed because target host or object does not exist
        
        
        Cause
        The address specified is not valid, or the program being connected to does not exist.
        Action
        Ensure the ADDRESS parameters have been entered correctly; the most likely incorrect parameter is the node name.  Ensure that the executable for the server exists (perhaps "oracle" is missing.)
        
     
    
    
        TNS-00515
        Connect failed because target host or object does not exist
        
        
        Cause
        The address specified is not valid, or the program being connected to does not exist.
        Action
        Ensure the ADDRESS parameters have been entered correctly; the most likely incorrect parameter is the node name.  Ensure that the executable for the server exists (perhaps "oracle" is missing.)