Why not possible to generate?

Why not possible to generate?

Using this

https://desk.zoho.com/DeskAPIDocument#TicketCount#TicketCount_Getticketcountbyfield

on my ZML script

url :"https://desk.zoho.com/api/v1/ticketsCountByFieldValues?departmentId=XXXXXXXXXXX&accountId!=XXXXXXXXX&customField1=cf_country_1:XXXXXX&field=overDue"

If I will give a condition that the count should exclude a specific accountId by using this "!="