Fetch values in a Subform what is the format or is it supported

Fetch values in a Subform what is the format or is it supported

Hi

Wanted to count the rows in a subform using count function but could not get that to work

Then i wanted to Fetch all the rows for a subform to obtain the count

Which leads me to the problem i cant see how to fetch the rows in a Subform
(or at least it is not obvious using script builder)

Help

Thanks