get_symbology not returning data

OK but then if I look at the output, those inputs that I put in the list should all be valid RICs right? So I still don't get why it is not working if I input the RICs as such and don't ask for all possible matches... I don't want a list of possible symbols I just want to know the values (tickers, cusips, sedols, etc) that match those literal RICs

Maybe I'm not explaining clearly but I am entering what should be *unique* RICs. I want unique ids like CUSIPs from those (was using default params but I can specify if it helps get my point across). So for instance the below:

ek.get_symbology((['EAT','LB','WSM']), from_symbol_type="RIC", to_symbol_type="CUSIP")

Gives me nothing... To make it more pointed, the below should return the same as my input (converting a RIC into a RIC), yet it doesn't (?)

ek.get_symbology((['EAT','LB','WSM']), from_symbol_type="RIC", to_symbol_type="RIC")

(All works fine with many other tickers, just not these)