Hi all, I need to express something which refers to variable I defined, and it seems impossible. For instance User creates a webpage W1. W1 contains two fields F1 and F2. F1's name is "Login". F2's name is "password". W1 contains a button B1. B1's name is "Connexion". If WebUser clicks on B1 then Ocsigen calls Login's service. works perfectly. But if I want to write : User creates a webpage W1. W1 contains two fields F1 and F2. F1's name is "Login". F2's name is "password". W1 contains a button B1. B1's name is "Connexion". If WebUser clicks on B1 and F1 is not empty then Ocsigen calls Login's service. It fails with an error : value="Redefined variable: F1" repair="Assign unique variables." I don't understand why it's an error, we usually need to express sentences which refer to previously defined variables. There's probably a work-around I missed, so what is it ? Thank you Regards, -- --------------------- <a href="https://twitter.com/#%21/ontologiae/" target="_blank">https://twitter.com/#!/ontologiae/</a> <a href="http://linuxfr.org/users/montaigne" target="_blank">http://linuxfr.org/users/montaigne</a>