roll up values for sub accounts

roll up values for sub accounts

Hi,

I would like to be able to roll up my sub accounts to a master account.  The example given:   https://www.zoho.com/crm/help/automation/custom-functions.html#Business_Scenario1  does not actually work as I have tried it as described to "learn" how it is done.

What i would like to do is simple:  if Parent account = "x" then update custom field with value.  the action is on create or edit as well which should trigger the summerization.

Can anyone from Zoho or the forum assist?

With Kind Regards,
Ray