Another fetch question...

I have 2 forms, one is CUSTOMET form, the other is a SUBSCRIPTION form.

I use an openurl script to open the SUBSCRIPTION form when the form CUSTOMER form is sumitted, fetching at the same time the customer name in the SUBSCRIPTION form in a lookup fileld. That works fine :

openUrl("https://creatorapp.zohopublic.com/cooprativelepr/rondine/form-perma/Abonnement/Ku4CSma5VKr82yXWGTBE6vvQfn5g9A3WyW9E3RfrJj32pE1bnhhu3qXAXb2tH0C40VjjdzVqyAeb8qFCYQq1UphFTjhV5h7uDjp6?Nom_Client=" + input.ID,"same window");

But I want also to fetch the email of the customer in another field. I use the following script in the SUBSCRIPTION form:

Var1 = Client[ID == input.Nom_Client];
input.Courriel_Client = Var1.Courriel_Client;

But that doesn't work, I get the following error (screen shot):

Anybody can help me ?

Sylvain