Hi Rob!

Further to this query, I was testing the UI action (which is working!)...let's say the first time I clicked on the Grab attachment button, the parent case had attachment A, B, and C. 

So I go to the task and click on "Grab attachment" --the attachments A, B, and C were copied from the parent case to the child task. 

And then later on, I put in attachment D in the parent task. I go to the child task, click on "Grab attachment". This time, all attachments --> A, B, C, and D are copied to the child task from the parent  case.

At the end, I now have 2 copies of attachments A, B, and C in the child task, and 1 copy of attachment D. 

Is there a way to only grab files that have not been grabbed?