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Hi @279045952
From the provided chain RIC, 0#FIBCOUNTRY=CCTB, it get expanded into only 1 valid RIC, 0#FIBCN=CCTB.
For the underlying 0#FIBCN=CCTB, it get expanded into 13xxx RICs which are considered a large list.
So you have to divide them into a smaller list when using get_data or you could run into error from the backend.
Here is the sample code (I divide them into 4500 RICs per request, if you consider adding more and more fields, you may define a smaller RIC list)
Are you using get_data to request the RIC?
The RIC "FIBCOUNTRY=CCTB" seems to be invalid RIC from my test.
Can you try
ek.get_data(["0#FIBCOUNTRY=CCTB"],fields=["DSPLY_NAME"])