Python Codebook DERV_CHN empty result

Hello,

I'm interested in retrieving a list of current derivative contracts for a given index or single name equity.

As an example, i've found this instrument "0#SPXW*.U" but I haven't had any luck in retrieving the list of option contracts from it.


I expected the below to work but it returns an empty df:

import refinitiv.data as rd

rd.open_session()

df = rd.get_data(universe = ["0#SPXW*.U"], fields = ['DERV_CHN'] )

df


Any help would be much appreciated!