How to get data in dynamic link.?

in my payment entry ill try to get SI No from Sales Invoice but when i make payment entry the field is empty. ill try the READ ONLY but it doesnt work. i think this is possible in custom script please help me. thanks.

I believe it is fetched already. Did you expand the row in the payment entry table to see more details?

@umair
when i make payment entry the si no will not show but
when i delete the “name” field, then input again the si no. will show. i think i had a problem in the refresh field.

yes i expand the row in the payment entry.