[R] matching by gender and age

[1Rnwb]

the examples work great but it gives me this error on this file
http://r.789695.n4.nabble.com/file/n3603737/il1ra_L.csv il1ra_L.csv 

> Age.co<-c(dat2b$Dr_Age)
> Sex.co<-as.factor(dat2b$Sex)
> casecont.co<-as.factor(dat2b$Self_T1D)
> stat.co<-as.factor(dat2b$status)
> 
> m <- matchControls(Sex.co~Age.co,contlabel="F")
Error in retval[k] <- controls[which.is.min(d[cases[k], controls])] : 
  replacement has length zero
In addition: Warning message:
In min(x, na.rm = TRUE) : no non-missing arguments to min; returning Inf

I would appreciate help to solve this.
Thanks
Sharad

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