ORA-01721
        USERENV(COMMITSCN) was invoked more than once in a transaction.
        
        
        Cause
        The USERENV('COMMITSCN') function was used more than once in the transaction, which was not allowed.
        Action
        Rewrite the transaction to use USERENV('COMMITSCN') only once and resubmit.
        
     
    
    
        ORA-01721
        USERENV(COMMITSCN) invoked more than once in a transaction
        
        
        Cause
        The USERENV('COMMITSCN') function can only be used once in a transaction.
        Action
        Re-write the transactioin to use USERENV('COMMITSCN') only once
        
     
    
    
        ORA-01721
        USERENV(COMMITSCN) invoked more than once in a transaction
        
        
        Cause
        The USERENV('COMMITSCN') function can only be used once in a transaction.
        Action
        Re-write the transactioin to use USERENV('COMMITSCN') only once