netROC problem

[wangjing54]

Hi, sorry to bother you, I think this package is very good, so I want to use it to analyze my data. when I used netROC function to analyze my data，I got a error, there are Error message:
Error in reformulate(attributes(Terms)$term.labels) :
'termlabels' must be a character vector of length at least one

The code I use was as follows:
myROC = netROC(case_dir = case_dir,

•            control_dir = control_dir,
  

•            marker = marker,
  

•            metadata = metadata,
  

•            plot.roc = TRUE, 
  

•            train.num = 20) 
  

Do you know what is wrong? I hope you can give me some suggestion, than you very much!
Jing Wang