Custom Function : Copy multilookup field to text field

Custom Function : Copy multilookup field to text field

Hi,

I'm a newbie on function programming,

I try to copy text from a multi lookup field named "societe" to a text field named "societe2".

I've used this code. In deluge script it seems to work, but when I trigger this function it doesn't work (Societe2 is still empty)

Argument :
Name : societe / string
Name : societe2 / string

Code :
resp = zoho.crm._updateRecord("Societe",Societe.toString(),{"Societe2":Societe}); 

Can anyone help me ?

Thanks a lot,