Hi, I am tring to get the purity file: para <- getPara() para$BAFfilter=1 #i think this needs correction instead of 10 para$datafile <- 'Test.Rdata' para$thr.penalty <- 300 para$savefile <- 'AGP_temp.txt' getAGP(para=para) I keep getting the following error: Error in dat[delPos, 4] * (1/para$LRR_correction_del) : non-numeric argument to binary operator Thanks Ron