Referencing question inside repeat group, to send as external app intent

Hi all, I'd much appreciate some help with the below problem:

I'd like to send the value of ${this_acc} to the external app as shown in the highlighted part in the attached image. What I've entered results in the following error message in Collect: Could not evaluate '/myform/g_old/this_acc'.

What is the right syntax to do this?

Hi @ks_1
The syntax looks fine... could you attach your form? Maybe that question reference should start with data not myform if you don't specify Specify XForms root node name as myform.