getting different results depending on number of RICs supplied

Hello @ajalden,

This looks to be something else, please find my list with AAPL.O ( ~90 instruments), try running below on your side. I get back everything for AAPL.O ( please see the screenshot of the output included above).

Do you observe the same by running:

nYrs2incl=5
EDate = -nYrs2incl*365
df = ek.get_data(
instruments = ["AAPL.O","ADBE.O","ADSK.O","ALTR.O","AMAT.O","AMGN.O","AMZN.O","APCC.O","APOL.O","ATYT.O","BBBY.O","BEAS.O","BIIB.O","BMET.O","BRCM.O","CDWC.O","CECO.O","CELG.O","CHIR.O","CHKP.O","CHRW.O","CMCSA.O","CMVT.O","COST.O","CSCO.O","CTAS.O","CTSH.O","CTXS.O","DELL.O","DISH.O","DLTR.O","EBAY.O","ERICY.O","ERTS.O","ESRX.O","EXPD.O","FAST.O","FISV.O","FLEX.O","GENZ.O","GILD.O","GRMN.O","INTC.O","INTU.O","ISIL.O","IVGN.O","JDSU.O","JNPR.O","KLAC.O","LAMR.O","LBTYA.O","LLTC.O","LNCR.O","LRCX.O","LVLT.O","MCHP.O","MEDI.O","MLNM.O","MOLX.O","MRVL.O","MSFT.O","MXIM.O","NTAP.O","NVLS.O","ORCL.O","PAYX.O","PCAR.O","PDCO.O","PETM.O","PIXR.O","QCOM.O","QLGC.O","RIMM.O","ROST.O","SANM.O","SBUX.O","SEPR.O","SHLD.O","SIAL.O","SIRI.O","SNDK.O","SNPS.O","SPLS.O","SSCC.O","SUNW.O","SYMC.O","TEVA.O","TLAB.O","VRSN.O","WFMI.O","WYNN.O","XLNX.O","XMSR.O","XRAY.O","YHOO.O"],
fields = ['TR.EventStartDate(EventType=RES,SDate=0,EDate=' + str(EDate) + ')'])
pd.set_option('display.max_rows', 2000)
print(df)
pd.reset_option('display.max_rows

Next, replace my list with your list, observe the result, let us know?