get_timeseries `No data available for the requested date range` and other problems

Hi,

I am running the following code:

def getPrices(RIC):
    try:
        return ek.get_timeseries([RIC], interval='quarterly', start_date='1900-12-31')[["CLOSE"]].rename(lambda x: RIC, axis=1)
    except: # ek.EikonError
        return None

exp = "SCREEN(U(IN(Equity(active,public,primary))/*UNV:Public*/), IN(TR.ExchangeCountryCode,""CA""), CURN=CAD)"
equities = ek.get_data(exp,["TR.Instrument", "TR.SharesOutstanding"])[0]
prices = [getPrices(ins) for ins in equities.Instrument]

There are a few problems right now.

1. I'm getting a large number of "No data available for the requested date range" (e.g. for RIC VIBE.CD) After adjusting the date range, the same RICs still return the same error message.

2. This is taking a very long time, probably because I am getting time series for each of the 3000+RIC's retrieved from the screen. Is there a more efficient way to achieve the same goal?