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...s What does this mean? Is this because I have too many observations? What can I do to fix it? Please let me know if you need further information. Thank you in advance for your cooperation. Regards, Nuno PS here is a transcript of the script I'm using library(FEAR) abc <- read.csv("Jul_data.csv",header=TRUE) x=matrix(nrow=1,ncol=39182) x[1,]=abc$apr_repayment y=matrix(nrow=7,ncol=39182) y[1,]=abc$pcadv y[2,]=abc$until y[3,]=abc$cashback_rate y[4,]=abc$self_certify_ind_d y[5,]=abc$incentive_ind_d y[6,]=abc$features_1 y[7,]=abc$discount dhat=dea(XOBS=x,YOBS=y,RTS=3,ORIENTATION=2) b...