I am trying to create the roc plot bootstrap method from library(verification), and when I set the plot =both or emp then I get the following error. The roc.plot works fine when the plot is set to binorm. This is my first time using this function in R and am not sure what this error means or how to resolve the issue. It seems to work ok with the example dataset. Is there an option or data formatting I need to due to resolve this error? 
 
roc.plot((scicomp5.model1[164]=="High Price"), pred, CI = T, n.boot = 100, plot = 'both',binormal = TRUE,
+          main = paste('AREA UNDER CURVE (AUC) =', round(auc$A, 2)))
Error in text.default(DAT[id, 3, i], DAT[id, 2, i], plot.thres[id2], pos = 4,  : 
  zero length 'labels'



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