ORA-12597
        TNS:connect descriptor already in use
        
        
        Cause
        Internal error - illegal use of connect descriptor.
        Action
        Not normally visible to the user. For further details, turn on tracing and reexecute the operation. If error persists, contact Oracle Customer Support.
        
     
    
    
        ORA-12597
        TNS:connect descriptor already in use
        
        
        Cause
        Internal error - illegal use of connect descriptor.
        Action
        Not normally visible to the user. For further details, turn on tracing and reexecute the operation. If error persists, contact Oracle Customer Support.
        
     
    
    
        ORA-12597
        TNS:connect descriptor already in use
        
        
        Cause
        Internal error - illegal use of connect descriptor.
        Action
        Not normally visible to the user. For further details, turn on tracing and reexecute the operation. If error persists, contact Oracle Customer Support.