1) Shouldn’t a rollup of a number in a portfolio formula custom field see that subtask’s value as part of the rollup? 2) One form of rollup syntax seems to generate error

[Tetsuo_Kawakami]

Did you find any way to get rollup to refresh, even if not practical, just to see it working temporarily at least?

Yes! Eureka! found it😁. This is available for tasks and subtasks.

1. add a formula field below in a project.
   

   

2. add a formula field below in a portfolio .
   

   

We’ll get the following for tasks.

and the following for subtasks.

The formula below in No.1 is always zero.

It normally doesn’t make sense. But in this case, it seems to force Asana to refresh rollup(due date - dummy date) in No.1. Therefore it’s so important😏.
I hope rollup() refreshes itself without doing this.
Go for it, Asana develpers!